Great instruction. After installing a new battery in a 2012 Camry, it was neccessary to perform the "idle re-learn" procedure. The procedure you outline here is correct and works perfect.
Great instructional video thank you. BTW video did not show when the intake duct clamp was tightened onto the throttle body, this comes last and is easy to forget. Also after cleaning the throttle body it is perfectly normal for RPM to go up since air flow has changed because of the cleaning performed. Going through re-calibration /re-learn process will bring RPM back to specification as shown. One could just drive around for awhile and result would be the same..Thanks again.
I've found that if you disconnect the negative terminal on the battery for a few minutes, then connect the battery and start the car, the idle should reset itself in just a few seconds. Nothing more to do, except take it for a short drive. Any further throttle relearn and refinement should happen as you drive it.
Ya this won’t work long term, your Toyota will re learn the previous performance parameters, your poor idle/rough shift etc condition will return. It may take a few weeks.
Thanks for sharing this. I just had to do this on a Scion tc after replacing the water pump (which includes removing the alternator, thus disconnecting battery during the job). After starting the vehicle, it started idling correctly. I then turned on AC. Idle dropped then recovered after several seconds. I repeated this with car in neutral (AC on, AC off) and in Drive (AC on/off). I had to repeat these steps a couple times to establish proper idle RPM. So if you're doing it, after establishing proper idle as shown above, continue the process with AC on/off.
Thank you for coaching me through this procedure. I have done it many times on linkage throttle bodies but was always afraid I'd damage the electronic servo mechanism. You are the second mechanic that confirmed there is no fear of damage so long as you keep the key out of the ignition during the cleaning. No need to disconnect the battery. Once the procedure is complete start the engine and No Error codes!!!! Mine immediately idled about 1100 rpm. I drove it for 30km+ on the highway and once the engine was good and hot the idle dropped below 750rpm. I restarted the engine and it stayed at that same normal idle speed. BTW for some reason the blue gloves I used(perhaps cheap ones) began to melt and break up. I think it was after coming in contact with the carburetor cleaner as I cleaned the TB. Good thing I noticed it as pieces glove could have fallen into the TB. My top plate was very clean in when I first looked but when I cleaned the underside I discovered it was coated in carbon. Anyways, many thanks at steering me around the few snags like prying out the plastic cable harness clip and coming around the passenger firewall to loosen the 10mm screw clamp with an extension. Happy motoring at 130,000km. Cheers to DIY & Life Skills.
Only 130km, you gotta good start in keeping your car running well. I’ve done TB and MAF cleaning on many modern cars and I’ve never had any big issues. Most of the time, the idle RPM self corrects immediately or after running for few minutes. Only a few times (less than 20%), I would have to do idle-learn procedure. My blue gloves, bought from Harbor Freight, holds up well against cleaning sprays, but the clear gloves I bought for COVID protection, seems to slightly dissolve slightly on contact with car cleaning sprays. Also, hopefully, you cleaned the mass airflow sensor too while at it.
Next, I’m gonna replace the PCV valve, which is in a tricky location, but it’s definitely accessible by removing the front left tire. What year is your Camry?
Yes, I cleaned the MAF sensor safely with the correct MAF spray. I bought a new PCV part from the dealer last year but could not get in far enough to replace it even after jacking up the front end and seeing a few videos on how to do it. This 2ARFE engine had its PCV part moved in front of the passenger lower firewall but high enough that it's near impossible to access, unlike earlier versions of in-line 4s. Fortunately, the dealer mechanic and an after market mechanics both say that if I am not burning oil or getting error codes then not to bother replacing it. For now I have a $20 Toyota souvenir. But if you want to put out a video on how to do it I will surely tune in. The only common story I hear everywhere about these newer engines is to change the 0W20 engine oil every 5km or every 6 months....with out fail to keep the engine protected. Our Camry is a 2012 and does not burn oil. Thank goodness! We bought it used because the computerization of late model cars has me fearful of things breaking down and leaving me at the mercy of the dealer and automaker. Things like e-parking brakes and start-stop engines just don't make any sense to me and has my mind shopping for older dumbed down cars rather than newer ones. I've come to the conclusion this is to have the computer fully control the car from steering, braking, lane departure assist, proximity sensors and back up cameras all for the purposes of A-I and communicating back to the Mother ship. Just recently I learned, from U-tubes,how to deal with servicing my son's newer Civic with e-parking brake(EPB) w/o a computer so I got around that issue safely and best of all, no error codes. Having mentioned that, I read that Toyotas have a special sequence of button pushes that puts their EPB into service mode so we can work on them w/o a computer. Good move TOYOTA!!! I will stick with this brand for now. Cheers to DiY & Life Skills!
@@bartonchu670 For the longest time Toyota and Lexus had PCV in easily accessible location but now now move it to hard to reach location. I’m in middle of couple of videos but my wife’s Camry has 73K miles so it’s ready for a new PCV. It’s not burning oil, but I’m not waiting for that to do proper maintenance. I have boroscope camera so I’ll try to get a good detail video for this.
Just cleaned my 2012 Camry throttle body and MAF sensor last week. cleared the check engine light that came on from taking the maf sensor off and just allowed the cars idle to slowly adjust itself on its own (which it did) went for a drive right after and it’s Been running great since. P.S. My 2012 Camry has almost 170,000 miles
Good job!. Mine is 2013 and about 74K. I’m gonna do PCV valve change soon and I bought a borescope to do a detailed video since it’s in very tricky and tight space. If you haven’t done that, come back and check it out. I try to change PCV every 50k mike’s or so as good maintenance since it’s cheap but can stop losing oil and cuts down in emissions.
@@DIYLifeSkills I saw your video on the PCV project with the endoscope. I also saw on Amazon various endoscopes available and would like to know which one you used and how you evaluate it. Thanks!
Thanks man very helpful video😀 my car was dying sometimes at 🛑 stoplight when I came to a full stop just with AC on I was able to drive !! I did it today ! I did not disconnect any sensor (don’t want to mess with check engine light 💡)as you said and it worked great 👍 it was very dirty inside my car is a Camry 2014 SE 193k miles it’s a taxi 👍 at the beginning it was getting high rpm I disconnected the negative cable waited a few minutes and star the car again while I’m taking a ride the rpm star coming down to normal very helpful sr 😀👏🗽
Terrific. At 193K miles, I can imagine how dirty it was. With TB and MAF cleaned, you'll notice slight improvement in performance and gas mileage as well. If you haven't, that car is due for PCV valve and spark plug changes as well. Spark Plug change: th-cam.com/video/pkZSAYaQaug/w-d-xo.html PCV change th-cam.com/video/thl4Ubq2obo/w-d-xo.html
I just did this after watching this video and it went great. My only comment is that a short Phillips head screwdriver worked great on that tightener bolt back by the firewall.
I cannot get that flex hose off either. Getting the clamp off was a major chore. Finally got it but not having any luck removing flex hosr from throttle body.
@@johnhefter3815 make sure clamp is really loose and not obstructing the hose. Afterwards, it’ll take some wiggling back and forth. In my case, I used a long screwdriver to help pry up from all sides. If you have small can of penetrating oil spray or even W2, it’ll help to slide the flex hose out. It’s in there tight for a reason being once the airflow amount is determined by MAF sensor, it doesn’t want any air leak to alter that which will mess up fuel to air mixture ratio since modern car performance is very sensitive to the accuracy.
Followed your steps for the MAF and throttle body cleaning. My 2015 Camry idles so smooth now, you can’t even tell the engine is on. Had an issue with the idle though at first start up. Got everything back together and my idle was at 1500 in park, 1050 in drive. Tried the idle relearn, but it didn’t do anything. Took for a test drive and the idle went back to normal (coincidence?). Great video!!
If you could have used a much smaller and less plush microfiber towel . And turned the key to on and put a brick or something similar on the gas pedal to open the throttle plate .
Next time, I'll let my push down on the gas pedal without the car started to see if the TB plate opens up. If it does, that'll be a good way to go as well. I got a bunch of microfiber towels from Costco in a pack. They are typical work shop towel size about 12" x 12". Actually, this was a good size for me because it's small enough fit into TB but big enough to wrap around your hand. When it gets to 100K, I'll probably remove the TB completely and do the deep cleaning. Thanks for comments!
There are at least 2 TH-camrs who show the cleaning with ignition key on accessory and with an assistant or stick at the gas pedal to keep the plate open for cleaning. Sounds convenient. But Car Care Nut advises against such practice, and some other mechanics even warn that the butterfly may suddenly close on your fingers. I don't know. But I like the idea of using a soft wedge to keep the thing open between wiping and swapping rags -- with car key off. I also wonder if pressing the gas pedal with ignition on would activate the injectors?
@DIYLifeSkills I got that part. I was trying to figure out if that hose connects to the intake manifold on the other end. I think it does from watching other videos. And I'm asking because is that a good place to do a seafoam spray treatment (vs taking off the entire air filter box to get to the throttle body)?
@@OldCootProductReviews I can’t tell clearly without removing everything but engine is scorching hot. It looks like it’s connected to brake booster vacuum line.
@@OldCootProductReviews also I’m kit 100% site which way the airflow is occurring. Even if air moves towards TB, you are only going to clean only partial front plate and back side won’t be cleaned. What’s important is you clean the round edges as that’s where heavy carbon build up occurs the most and you need to clean both front and back side.
You're not supposed to push down on tb valve like that it messes it up. You take the tb out and use thin fishing line to clear out the gunk between the valve
For some cars perhaps, especially German cars, but for Toyota and Lexus, that’s a myth. This topic has been covered by Toyota master mechanics. You can read about similar comments and answers in comments below. You do not need to worry about that for Toyota. That said, it’s better to remove TB to clean as it give you better access to the back side but not because it’ll mess up anything by moving the TB plate
For sure that would be more effective especially to clean the back side on cars with heavy carbon build up. For moderate carbon build up, this is pretty effective also.
This was just regular maintenance like replacing air filters. Dirty MAF and TB will lead to poor engine performance including check engine light and poor fuel consumption.
Do you know why my 2012 Toyota Camry Le shakes a lot when going over 70 miles and it gets worse if I have the air conditioning on? Please advise. God bless you.
My 2016 Rav4 (4cyl) occasionally idles a little low when in D or R (dipping down to around 500), and will vibrate for a few seconds until idle picks back up to 650 rpm. This happened without the AC on. Is this something concerning I should look into resolving? Should I try to disconnect the battery to relearn the idle? Throttle body was cleaned recently, 10k miles ago. New battery around 5 months ago. Thank you for replying to comments!
How many miles do you have? Once car idle falls below 600 RPM, engine will run rough and close to 500 engine can shut down. This is because air and fuel mixture has to be close to 14.7 to 1 ratio. Between Mass airflow sensor, oxygen sensor, and throttle body position, ECU computes correct fuel mixture…meaning adjusting throttle plate opening, fuel amount, etc.
If you didn’t clean mass airflow sensor, do that. Also any air leak after mass air flow sensor will throw off the air:fuel me tire ratio. Very carefully check entire intake hose for any gaps and crack. Additional air feed after MAF will throw off calculation.
Also any tiny leak in vacuum hose will also throw off the air fuel mixture. The problem with rubber hoses are visually they can look OK until you bend it and can see hairline cracks.
Though less likely, your fuel injector could be slightly clogged so it’s not feeding as much as car thinks it’s feeding. Usually you can clean this with regular use of fuel injectors. I buy a gallon of Lucas fuel injector cleaner and use it regularly in all my cars. Just put a small amount in gas tank before every few fill up
@@DIYLifeSkills Thank you very much! I only have 68k miles. Will this cause any long term damage if unaddressed, or is it something that should be fixed to preserve life of car.
Should be same assuming everything is installed back properly. To be frank, I do MAF and TB cleaning regularly for all my cars, and most of the time, the idle learn is not necessary as car’s computer does that automatically every time you drive. It’s actually constantly being monitored and adjusted. Idle relearn is only used if engine idles really rough and not safe to drive. Try driving for about 30-60 minutes normally in city to give speed variance vs. constant highway speed and it should adjust to the optimal setting automatically.
There are multiple challenges with that. First for intake air to travel from MAF hole to the TB, engine has to be running, and ECU may get confused in calculating MAF signal when it's pulled out. Second, the carbon deposits on the TB platter require some scrubbing pressure to come off. Even when I spray directly to black deposit spots, they don't dissolve and drop downward. This procedure is not difficult at all. Just unscrewing few things apart and you only need to do this once every few years. :-)
Missed this message earlier. The TB and MAF cleaning concept is pretty much same in all modern cars. However, your access to TB and MAF may differ. Compare my engine video shots to your engine layout and there is a good chance it could be very similar same.
RPM fluctuate in all cars for few minutes until engine wake up and it doesn’t matter whether you are standing still, sit in drive it reverse gear. Also ECU is constantly adjusting for best idle at all when you drive. Idle learn is for if idle is unstable even after engine warms up, or idle is too far away from normal 600-800 range.
@@DIYLifeSkills 2017 Corolla SE 105k miles I just put a new battery two weeks ago & new spark plugs this Friday. I don't know if that have anything to do with it.
At that Mike, if you haven’t, you need to replace spark plugs, PCV valve, clean MAF (mass airflow sensor), and TB (Throttle Body). My son has 2016 Corolla also just passed 100K miles so I’ll be doing above. I have a separate Corolla MAF/TB video here. th-cam.com/video/iSfICDCO2dQ/w-d-xo.html
Right now car is in body shop due to accident, but I already bought the spark plugs and PCV so I’ll have videos on those probably next months once I get car back. At that time, I’ll also do the carbon build-up cleaning.
I have a 2013 Toyota Corolla wit 78k wen I come to a stop idle drops low like it's going to stall but it doesn't just shakes bad and idle will come back up any suggestions u might have would help thanks
Also I use this fuel injector cleaner regularly..like once every couple of months. www.walmart.com/ip/LUCAS-OIL-10013-Fuel-Treatment-Gallon/45819324?wmlspartner=wlpa&selectedSellerId=0&&adid=22222222228033121936&wl0=&wl1=g&wl2=m&wl3=76978261391&wl4=pla-133675724951&wl5=9027782&wl6=&wl7=&wl8=&wl9=pla&wl10=8175035&wl11=online&wl12=45819324&veh=sem&gclid=EAIaIQobChMI47iUhNTU8AIVIQnnCh1xGgYDEAQYAyABEgIIkvD_BwE&gclsrc=aw.ds
For Toyota and Lexus, this is fine as there is no active throttle plate position sensor while engine is off. It’s spring loaded to pull back to close and motor opens it when engine is running. When engine is running, throttle position sensor activates and starts adjusting the plate opening as needed. After cleaning very dirty plate, engine may idle higher a bit and you just drive it normally and ECU will auto-calibrate as necessary
For sure. The TB plate is connected to pretty strong spring so it’s hard to open it suddenly but the spring will slam it shut. So on close, guide it slowly to close and don’t let it slam shut.
Most modern cars I’ve seen are all electronically controlled TB. We are mainly Toyota/Lexus family and I’ve been cleaning this way on a on multiple generations of Camry and Corolla without any issues over many years. Only one time VW Jetta showed erratic RPM and lit up the Check engine light, but upon idle relearn steps, all was normal again. If you want, you could either disconnect the TB wiring or you disconnect the negative terminal of battery, so that there is no awareness of TB plate being moved.
many videos out there including manufacturers certified mechanics...if you open it with your fingers gently and slowly without pushing hard, it will be perfectly fine..
bro, I want to ask for help. I have 2012 camry. This video was really helpful. I want to ask for help. When the vehicle stops while driving fine, the rpm drops slightly and the vibration becomes severe. How can i repair this? I heard there was a device called 'idle speed actuator'. Does my car not have this? Only just cleaning the MAF and throttle valve?
How many miles? Definitely the most likely and cheapest to do is clean MAF and TB. If that doesn’t fix it, you could have a slight vacuum leak. Check all air hoses very carefully. I mean you have to literally bend it and find cracks. Initially very small crack may not be visible until you bend the hose. Also air could leak from with intake or exhaust manifold gasket on high mileage cars. Idle speed actuator is all built into TB.
@@DIYLifeSkills Currently my car has 174000 miles on it. I never thought of vacuum leaks. Before checking the intake and exhaust manifold gaskets, the air hoses are something I can bend myself, so I'll go and check for cracks soon. Thank you so much for replying so quickly. You must be the best mechanic.
@@broj5370 if you have that high miles, did you change spark plugs? Also, your PCV valve is likely clogged and need replacement (I have videos on these)
Yeah you just have to carefully wiggle it. Being tight is actually good so that mass airflow sensor can compute air supply accurately without having extra air sneaking in
Unless you are having very erratic idle after MAF and TB, which is rare, the car’s computer is constantly auto adjusting to the changes in air fuel mixture. In my experience the idle usually doesn’t change too much and if it idles rough, it’s usually brief and auto corrects itself as you drive around.
So I cleaned my throttle body and MAF sensor on a 2008 Camry. I was able to get the idle to run normally after following the idle relearn procedure, but I noticed there is a delay in acceleration when I mash on the gas pedal. Does anyone know how to fix it?
First Camry has a slight pause when you try to accelerate quickly unlike German cars. That said, more pronounced delay in acceleration is likely some combination of spark plugs being too old or out of gap, fuel injector is not spraying out fine mist due to partial clog, or have too much carbon buildup on piston heads. How many miles do you have in the car? And when was the spark plugs replaced? Also, filling up with top tier gas will keep the engine cleaner and running smoother over time. Top tier gas are found at Shell, Mobile, Costco, etc. depending on your answer I have additional suggestions.
After cleaning both the throttle body and the MAF sensor, some codes popped up. So I used an OBD scanner tool to erase the codes. I don't know if the slight delay is caused by wiping out the learned values from the ECU or from cleaning out the throttle body. Before, I noticed that the throttle was more responsive, but after cleaning, I noticed that it would take a second or two after pressing on the pedals all the way before I could feel the hard acceleration. However, I recently bought the car for 95,000 miles. I have no idea how the previous owner serviced the car, but I decided to give it a tune up. I replaced the air filter with a K&N filter and added the Lucas Fuel Injector (like you mentioned). I would like to change out my sparkplugs, but I have a 2GR-FE engine. Getting those sparkplugs in the back seems like a hassle, so I might just get a mechanic to install it for me.
@@Kim-gw6jv here is a video on 2grfe spark plug change. It’s little bit hassle to get to back plugs but there is no complex or tricky step. After TB and MAF cleaning, it takes little bit of driving for ECU to learn the best air/fuel mixture. In fact, ECU is constantly monitoring and making adjustments. At near 100K, you are due for spark plug change. Be aware that Amazon and eBay have cheaper but fake OEM plugs. Avoid those and only buy from a reputable auto parts store. And get the exact match as slight difference in firing cause misfire in these engines.
@@Kim-gw6jv Also keep a close eye on the oil level and see if it’s burning oil. Best way to do this fill the oil the top mark and drive 1000 miles and see how much it went down. I just drove 2200 round trip to Chicago on my 2013 Camry and it burned only 1/3 quart, which is excellent. Burning oil could indicate other problems like carbon buildup on piston and not efficient combustion.
It’s mainly due to cleaning spray getting into engine but that burns off within minutes. Also, depending on how dirty your MAF and TB were, after cleaning car’s computer needs time to make adjustment. Just drive normally for a day or two and it’ll go away once computer adjusts to cleaned TB and MAF signals.
Yes I tried driving it for 30minutes but the codes would still show up. I will continue to drive under normal conditions for two days and see if that goes away
I tried this on my 2014 Camry and I’m still idling at around 1200 rpm’s. Any clue why it won’t relearn the idle? I even tried disconnecting the negative battery terminal.
@@joshrocks323 It's normal for car to idle high on cold start and then gradually come down to 600-700 range as the car warms up. Is it idling high even after driving for few minutes when you come to a stop?
@@joshrocks323 If the high idle is only in parked or neutral position at stop, and it is not misfiring and it's not running rough other than slightly higher RPM, and then it drops to normal RPM while driving, then it should be OK to drive. What symptoms were you having that led to MAF & TB cleaning? Also at 105K miles, you are due for spark plugs and PCV change as well. Has that been done? Also, when you get a chance, remove the air intake and take a close peak at the TB plate. It should be only slightly like 1/16" open.
That’s a myth for Toyota/Lexus cars as sensors only come into play when the engine is started. Car has no idea the plate opened and closed. And ECU constantly adjusts the plate opening based on all the air and fuel mixture ratio signatures compiled from MAF, oxygen sensor, RPM, etc.
Transmission is to shift gears, and that's totally separate from TB & MAF that controls how much air is mixed with gas for optimal combustion. So manual trans also need to clean TB & MAF regularly.
@@hebaabdallah3518 Use the relearn steps in 16:56 . To put in drive, simply put in first gear while pressing on the brake. This is to expedite the idle relearn, if you drive the car, the car will relearn automatically eventually.
Using a micro fiber towel shouldnt be used cleaning inside the throttle body it will release fine materials as I even seen in this video happening falling into the throttle body, best to use red mechanics rags.
I wouldn’t worry about micro fiber particles coming out. You are doing this with no vacuum, so after you wet the TB plate with cleaning solution, just wipe away. And microfiber does better job at picking up more carbon and leave the surface clean. Definitely do not use old rag on this.
@@DIYLifeSkills It's much more of a PITA on my wife's 2011 Highlander with the 2.7L 4 cylinder. It's even further down with more hoses and crap to disconnect. DIYLifeSkills, can you please do a video this job on a Highlander or Venza with the 2.7L?
It’s actually a free music from TH-cam called “Toe Jam”. You can see full description that TH-cam automatically adds to video description. Due to licensing issues, TH-cam checks all music included int the video, so I can only use that TH-cam provides as free music. :-)
Great instruction. After installing a new battery in a 2012 Camry, it was neccessary to perform the "idle re-learn" procedure. The procedure you outline here is correct and works perfect.
Great. Thanks for the feedback
I have the same car. What big services have you had done at mechanic so far? I’m at 95k miles
Great instructional video thank you. BTW video did not show when the intake duct clamp was tightened onto the throttle body, this comes last and is easy to forget. Also after cleaning the throttle body it is perfectly normal for RPM to go up since air flow has changed because of the cleaning performed. Going through re-calibration /re-learn process will bring RPM back to specification as shown. One could just drive around for awhile and result would be the same..Thanks again.
I've found that if you disconnect the negative terminal on the battery for a few minutes, then connect the battery and start the car, the idle should reset itself in just a few seconds. Nothing more to do, except take it for a short drive. Any further throttle relearn and refinement should happen as you drive it.
Yeah after I powerfoam mine, ima disconnect the negative terminal for a couple minutes to take away the check engine light for the MAF sensor.
Ya this won’t work long term, your Toyota will re learn the previous performance parameters, your poor idle/rough shift etc condition will return. It may take a few weeks.
Thanks for sharing this. I just had to do this on a Scion tc after replacing the water pump (which includes removing the alternator, thus disconnecting battery during the job). After starting the vehicle, it started idling correctly. I then turned on AC. Idle dropped then recovered after several seconds. I repeated this with car in neutral (AC on, AC off) and in Drive (AC on/off). I had to repeat these steps a couple times to establish proper idle RPM. So if you're doing it, after establishing proper idle as shown above, continue the process with AC on/off.
@@michaelkies1 great feedback.
Thank you for coaching me through this procedure. I have done it many times on linkage throttle bodies but was always afraid I'd damage the electronic servo mechanism. You are the second mechanic that confirmed there is no fear of damage so long as you keep the key out of the ignition during the cleaning. No need to disconnect the battery. Once the procedure is complete start the engine and No Error codes!!!! Mine immediately idled about 1100 rpm. I drove it for 30km+ on the highway and once the engine was good and hot the idle dropped below 750rpm. I restarted the engine and it stayed at that same normal idle speed. BTW for some reason the blue gloves I used(perhaps cheap ones) began to melt and break up. I think it was after coming in contact with the carburetor cleaner as I cleaned the TB. Good thing I noticed it as pieces glove could have fallen into the TB. My top plate was very clean in when I first looked but when I cleaned the underside I discovered it was coated in carbon. Anyways, many thanks at steering me around the few snags like prying out the plastic cable harness clip and coming around the passenger firewall to loosen the 10mm screw clamp with an extension. Happy motoring at 130,000km. Cheers to DIY & Life Skills.
Only 130km, you gotta good start in keeping your car running well.
I’ve done TB and MAF cleaning on many modern cars and I’ve never had any big issues.
Most of the time, the idle RPM self corrects immediately or after running for few minutes.
Only a few times (less than 20%), I would have to do idle-learn procedure. My blue gloves, bought from Harbor Freight, holds up well against cleaning sprays, but the clear gloves I bought for COVID protection, seems to slightly dissolve slightly on contact with car cleaning sprays. Also, hopefully, you cleaned the mass airflow sensor too while at it.
Next, I’m gonna replace the PCV valve, which is in a tricky location, but it’s definitely accessible by removing the front left tire. What year is your Camry?
Yes, I cleaned the MAF sensor safely with the correct MAF spray. I bought a new PCV part from the dealer last year but could not get in far enough to replace it even after jacking up the front end and seeing a few videos on how to do it. This 2ARFE engine had its PCV part moved in front of the passenger lower firewall but high enough that it's near impossible to access, unlike earlier versions of in-line 4s. Fortunately, the dealer mechanic and an after market mechanics both say that if I am not burning oil or getting error codes then not to bother replacing it. For now I have a $20 Toyota souvenir. But if you want to put out a video on how to do it I will surely tune in. The only common story I hear everywhere about these newer engines is to change the 0W20 engine oil every 5km or every 6 months....with out fail to keep the engine protected. Our Camry is a 2012 and does not burn oil. Thank goodness! We bought it used because the computerization of late model cars has me fearful of things breaking down and leaving me at the mercy of the dealer and automaker. Things like e-parking brakes and start-stop engines just don't make any sense to me and has my mind shopping for older dumbed down cars rather than newer ones. I've come to the conclusion this is to have the computer fully control the car from steering, braking, lane departure assist, proximity sensors and back up cameras all for the purposes of A-I and communicating back to the Mother ship. Just recently I learned, from U-tubes,how to deal with servicing my son's newer Civic with e-parking brake(EPB) w/o a computer so I got around that issue safely and best of all, no error codes. Having mentioned that, I read that Toyotas have a special sequence of button pushes that puts their EPB into service mode so we can work on them w/o a computer. Good move TOYOTA!!! I will stick with this brand for now. Cheers to DiY & Life Skills!
@@bartonchu670 For the longest time Toyota and Lexus had PCV in easily accessible location but now now move it to hard to reach location. I’m in middle of couple of videos but my wife’s Camry has 73K miles so it’s ready for a new PCV. It’s not burning oil, but I’m not waiting for that to do proper maintenance. I have boroscope camera so I’ll try to get a good detail video for this.
@@DIYLifeSkills which engine have this tricky location of PCV? I think the V6 has it on the top
Just cleaned my 2012 Camry throttle body and MAF sensor last week. cleared the check engine light that came on from taking the maf sensor off and just allowed the cars idle to slowly adjust itself on its own (which it did) went for a drive right after and it’s Been running great since. P.S. My 2012 Camry has almost 170,000 miles
Good job!. Mine is 2013 and about 74K.
I’m gonna do PCV valve change soon and I bought a borescope to do a detailed video since it’s in very tricky and tight space. If you haven’t done that, come back and check it out. I try to change PCV every 50k mike’s or so as good maintenance since it’s cheap but can stop losing oil and cuts down in emissions.
@@DIYLifeSkills I saw your video on the PCV project with the endoscope. I also saw on Amazon various endoscopes available and would like to know which one you used and how you evaluate it. Thanks!
@@tinhhuynh2 I got depstech. I bought another cheap one for $20 and the resolution was not clear.
@@DIYLifeSkills Thanks!
I'm glad I seen your post on here I have a 12 and I can't nobody to fix it
Great video! Very detailed, good explanation of what you were doing from start to finish! Thanks!
Great Video and demonstration in the video. Keep up the great work. Thanks
@@skyisthelimit9951 Thanks for the kind feedback.
Thanks man very helpful video😀 my car was dying sometimes at 🛑 stoplight when I came to a full stop just with AC on I was able to drive !!
I did it today ! I did not disconnect any sensor (don’t want to mess with check engine light 💡)as you said and it worked great 👍 it was very dirty inside my car is a Camry 2014 SE 193k miles it’s a taxi 👍 at the beginning it was getting high rpm I disconnected the negative cable waited a few minutes and star the car again while I’m taking a ride the rpm star coming down to normal very helpful sr 😀👏🗽
Terrific. At 193K miles, I can imagine how dirty it was. With TB and MAF cleaned, you'll notice slight improvement in performance and gas mileage as well. If you haven't, that car is due for PCV valve and spark plug changes as well.
Spark Plug change:
th-cam.com/video/pkZSAYaQaug/w-d-xo.html
PCV change
th-cam.com/video/thl4Ubq2obo/w-d-xo.html
I just did this after watching this video and it went great. My only comment is that a short Phillips head screwdriver worked great on that tightener bolt back by the firewall.
Thanks for sharing feedback on short Phillips head screw driver.
I cannot get that flex hose off either. Getting the clamp off was a major chore. Finally got it but not having any luck removing flex hosr from throttle body.
@@johnhefter3815 make sure clamp is really loose and not obstructing the hose. Afterwards, it’ll take some wiggling back and forth. In my case, I used a long screwdriver to help pry up from all sides. If you have small can of penetrating oil spray or even W2, it’ll help to slide the flex hose out. It’s in there tight for a reason being once the airflow amount is determined by MAF sensor, it doesn’t want any air leak to alter that which will mess up fuel to air mixture ratio since modern car performance is very sensitive to the accuracy.
Great Video, you did a great favor to all of us!!! THANK YOU.
Thanks for the encouraging feedback. :-)
My ‘13 Camry XLE doesn’t have any kind of problems, idle speed is perfect, however I’ll save this video for future reference 👍💪
if the clamp was hard to get out the first time when you put it back just flip the clamp for next time it wont be the hard keep it simple
Followed your steps for the MAF and throttle body cleaning. My 2015 Camry idles so smooth now, you can’t even tell the engine is on. Had an issue with the idle though at first start up. Got everything back together and my idle was at 1500 in park, 1050 in drive. Tried the idle relearn, but it didn’t do anything. Took for a test drive and the idle went back to normal (coincidence?). Great video!!
Yeah idle relearn is usually not needed as idle is recalibrated automatically as you drive.
If you could have used a much smaller and less plush microfiber towel . And turned the key to on and put a brick or something similar on the gas pedal to open the throttle plate .
Next time, I'll let my push down on the gas pedal without the car started to see if the TB plate opens up.
If it does, that'll be a good way to go as well. I got a bunch of microfiber towels from Costco in a pack.
They are typical work shop towel size about 12" x 12". Actually, this was a good size for me because
it's small enough fit into TB but big enough to wrap around your hand. When it gets to 100K, I'll
probably remove the TB completely and do the deep cleaning. Thanks for comments!
There are at least 2 TH-camrs who show the cleaning with ignition key on accessory and with an assistant or stick at the gas pedal to keep the plate open for cleaning. Sounds convenient. But Car Care Nut advises against such practice, and some other mechanics even warn that the butterfly may suddenly close on your fingers. I don't know. But I like the idea of using a soft wedge to keep the thing open between wiping and swapping rags -- with car key off. I also wonder if pressing the gas pedal with ignition on would activate the injectors?
@12:53 what does that hose connect to on the other end? Does it go to the intake manifold directly? Or to the backside of the throttle body? Or ??
You can see the disconnect at around 3:05 time mark in terms of where it came from
@DIYLifeSkills I got that part. I was trying to figure out if that hose connects to the intake manifold on the other end. I think it does from watching other videos.
And I'm asking because is that a good place to do a seafoam spray treatment (vs taking off the entire air filter box to get to the throttle body)?
@@OldCootProductReviews I see what you are saying. I’ll have a look after I get home.
@@OldCootProductReviews I can’t tell clearly without removing everything but engine is scorching hot. It looks like it’s connected to brake booster vacuum line.
@@OldCootProductReviews also I’m kit 100% site which way the airflow is occurring. Even if air moves towards TB, you are only going to clean only partial front plate and back side won’t be cleaned. What’s important is you clean the round edges as that’s where heavy carbon build up occurs the most and you need to clean both front and back side.
You're not supposed to push down on tb valve like that it messes it up. You take the tb out and use thin fishing line to clear out the gunk between the valve
For some cars perhaps, especially German cars, but for Toyota and Lexus, that’s a myth. This topic has been covered by Toyota master mechanics. You can read about similar comments and answers in comments below. You do not need to worry about that for Toyota. That said, it’s better to remove TB to clean as it give you better access to the back side but not because it’ll mess up anything by moving the TB plate
I didn’t see you tightened the clamp at the throttle body
LOL. My wife said the same thing after I made the video. It was done but didn’t capture the video. Thanks for watching every detail.
shouldn't you removed the throttle body and clean it out? instead of letting dust get inside the machine? thanks for this detailed video :)
For sure that would be more effective especially to clean the back side on cars with heavy carbon build up. For moderate carbon build up, this is pretty effective also.
U need to replace the gasket. Where is the dust?
What was the problem with the vehicle that you were trying to resolve?
This was just regular maintenance like replacing air filters. Dirty MAF and TB will lead to poor engine performance including check engine light and poor fuel consumption.
This Video stopped
The shaking God Bless
Great to hear.
Do you know why my 2012 Toyota Camry Le shakes a lot when going over 70 miles and it gets worse if I have the air conditioning on? Please advise. God bless you.
@@solymarmar9592 It’s one of the following:
tires are worn unevenly. Tire needs balancing. Tires need alignment. Struts are worn.
@@solymarmar9592 does your steering wheel pull to one side and/or shakes when your car starts to shake?
Not much hassle just simply wiped things up and you r done no need to open the throttle body bolts or clean the tiny holes
My 2016 Rav4 (4cyl) occasionally idles a little low when in D or R (dipping down to around 500), and will vibrate for a few seconds until idle picks back up to 650 rpm. This happened without the AC on. Is this something concerning I should look into resolving? Should I try to disconnect the battery to relearn the idle? Throttle body was cleaned recently, 10k miles ago. New battery around 5 months ago. Thank you for replying to comments!
How many miles do you have? Once car idle falls below 600 RPM, engine will run rough and close to 500 engine can shut down. This is because air and fuel mixture has to be close to 14.7 to 1 ratio. Between Mass airflow sensor, oxygen sensor, and throttle body position, ECU computes correct fuel mixture…meaning adjusting throttle plate opening, fuel amount, etc.
If you didn’t clean mass airflow sensor, do that. Also any air leak after mass air flow sensor will throw off the air:fuel me tire ratio. Very carefully check entire intake hose for any gaps and crack. Additional air feed after MAF will throw off calculation.
Also any tiny leak in vacuum hose will also throw off the air fuel mixture. The problem with rubber hoses are visually they can look OK until you bend it and can see hairline cracks.
Though less likely, your fuel injector could be slightly clogged so it’s not feeding as much as car thinks it’s feeding. Usually you can clean this with regular use of fuel injectors. I buy a gallon of Lucas fuel injector cleaner and use it regularly in all my cars. Just put a small amount in gas tank before every few fill up
@@DIYLifeSkills Thank you very much! I only have 68k miles. Will this cause any long term damage if unaddressed, or is it something that should be fixed to preserve life of car.
Is idling in push button Camry 2012 different? Tried this didnt work :(
Should be same assuming everything is installed back properly. To be frank, I do MAF and TB cleaning regularly for all my cars, and most of the time, the idle learn is not necessary as car’s computer does that automatically every time you drive. It’s actually constantly being monitored and adjusted. Idle relearn is only used if engine idles really rough and not safe to drive. Try driving for about 30-60 minutes normally in city to give speed variance vs. constant highway speed and it should adjust to the optimal setting automatically.
@@DIYLifeSkills thank you for the info.
Fuel injectors removal/replacement video??
Yeah been wanting to do that anyway but after sort of semi-big project I have going with GS300 right now.
Can you just spray some cleaner through the mass air flow hole into the throttle body ?
There are multiple challenges with that. First for intake air to travel from MAF hole to the TB, engine has to be running, and ECU may get confused in calculating MAF signal when it's pulled out. Second, the carbon deposits on the TB platter require some scrubbing pressure to come off. Even when I spray directly to black deposit spots, they don't dissolve and drop downward. This procedure is not difficult at all. Just unscrewing few things apart and you only need to do this once every few years. :-)
Is this also applies to the newer model? 2018 and up? Thx
Missed this message earlier. The TB and MAF cleaning concept is pretty much same in all modern cars. However, your access to TB and MAF may differ. Compare my engine video shots to your engine layout and there is a good chance it could be very similar same.
Can I do the idle relearn for reverse, my rpm only fluctuate when I first crank up the car and put it in reverse.
RPM fluctuate in all cars for few minutes until engine wake up and it doesn’t matter whether you are standing still, sit in drive it reverse gear. Also ECU is constantly adjusting for best idle at all when you drive. Idle learn is for if idle is unstable even after engine warms up, or idle is too far away from normal 600-800 range.
How miles do you have and what year is Camry?
@@DIYLifeSkills 2017 Corolla SE 105k miles I just put a new battery two weeks ago & new spark plugs this Friday. I don't know if that have anything to do with it.
At that Mike, if you haven’t, you need to replace spark plugs, PCV valve, clean MAF (mass airflow sensor), and TB (Throttle Body). My son has 2016 Corolla also just passed 100K miles so I’ll be doing above. I have a separate Corolla MAF/TB video here. th-cam.com/video/iSfICDCO2dQ/w-d-xo.html
Right now car is in body shop due to accident, but I already bought the spark plugs and PCV so I’ll have videos on those probably next months once I get car back. At that time, I’ll also do the carbon build-up cleaning.
I have a 2013 Toyota Corolla wit 78k wen I come to a stop idle drops low like it's going to stall but it doesn't just shakes bad and idle will come back up any suggestions u might have would help thanks
Did you clean the Throttle Body and Mass Airflow Sensor? I can do a quick video of Corolla this weekend if you haven’t. I have 2016 Corolla also.
@@DIYLifeSkills no I haven't cleaned it yet but plan on doing it this weekend
Did you get a chance to clean TB and MAF yet? I did a quick video on my son’s Corolla.
th-cam.com/video/iSfICDCO2dQ/w-d-xo.html
Also I use this fuel injector cleaner regularly..like once every couple of months.
www.walmart.com/ip/LUCAS-OIL-10013-Fuel-Treatment-Gallon/45819324?wmlspartner=wlpa&selectedSellerId=0&&adid=22222222228033121936&wl0=&wl1=g&wl2=m&wl3=76978261391&wl4=pla-133675724951&wl5=9027782&wl6=&wl7=&wl8=&wl9=pla&wl10=8175035&wl11=online&wl12=45819324&veh=sem&gclid=EAIaIQobChMI47iUhNTU8AIVIQnnCh1xGgYDEAQYAyABEgIIkvD_BwE&gclsrc=aw.ds
I heard that we should not move throttle plate by hand.
For Toyota and Lexus, this is fine as there is no active throttle plate position sensor while engine is off. It’s spring loaded to pull back to close and motor opens it when engine is running. When engine is running, throttle position sensor activates and starts adjusting the plate opening as needed. After cleaning very dirty plate, engine may idle higher a bit and you just drive it normally and ECU will auto-calibrate as necessary
@@DIYLifeSkills I heard if you move it, do it slowly.
For sure. The TB plate is connected to pretty strong spring so it’s hard to open it suddenly but the spring will slam it shut. So on close, guide it slowly to close and don’t let it slam shut.
You can but don't move it rapidly.
Very descriptive. Thanks.
Is it an electric throttle body? Will I mess things up when I move the flap with my fingers?
Most modern cars I’ve seen are all electronically controlled TB. We are mainly Toyota/Lexus family and I’ve been cleaning this way on a on multiple generations of Camry and Corolla without any issues over many years. Only one time VW Jetta showed erratic RPM and lit up the Check engine light, but upon idle relearn steps, all was normal again. If you want, you could either disconnect the TB wiring or you disconnect the negative terminal of battery, so that there is no awareness of TB plate being moved.
Not toyota
many videos out there including manufacturers certified mechanics...if you open it with your fingers gently and slowly without pushing hard, it will be perfectly fine..
bro,
I want to ask for help. I have 2012 camry. This video was really helpful. I want to ask for help.
When the vehicle stops while driving fine, the rpm drops slightly and the vibration becomes severe. How can i repair this?
I heard there was a device called 'idle speed actuator'. Does my car not have this?
Only just cleaning the MAF and throttle valve?
How many miles? Definitely the most likely and cheapest to do is clean MAF and TB. If that doesn’t fix it, you could have a slight vacuum leak. Check all air hoses very carefully. I mean you have to literally bend it and find cracks. Initially very small crack may not be visible until you bend the hose. Also air could leak from with intake or exhaust manifold gasket on high mileage cars. Idle speed actuator is all built into TB.
@@DIYLifeSkills Currently my car has 174000 miles on it.
I never thought of vacuum leaks.
Before checking the intake and exhaust manifold gaskets, the air hoses are something I can bend myself, so I'll go and check for cracks soon.
Thank you so much for replying so quickly. You must be the best mechanic.
@@broj5370 if you have that high miles, did you change spark plugs? Also, your PCV valve is likely clogged and need replacement (I have videos on these)
Thank you
More difficult to get that hose out than in my 2001'Camry....
Yeah you just have to carefully wiggle it. Being tight is actually good so that mass airflow sensor can compute air supply accurately without having extra air sneaking in
Everything is for automatic transmission, how would I relearn the throttle on a manual transmission??
Unless you are having very erratic idle after MAF and TB, which is rare, the car’s computer is constantly auto adjusting to the changes in air fuel mixture. In my experience the idle usually doesn’t change too much and if it idles rough, it’s usually brief and auto corrects itself as you drive around.
Did you do the MAF and TB cleaning already and are you experiencing rough idle?
So I cleaned my throttle body and MAF sensor on a 2008 Camry. I was able to get the idle to run normally after following the idle relearn procedure, but I noticed there is a delay in acceleration when I mash on the gas pedal. Does anyone know how to fix it?
First Camry has a slight pause when you try to accelerate quickly unlike German cars. That said, more pronounced delay in acceleration is likely some combination of spark plugs being too old or out of gap, fuel injector is not spraying out fine mist due to partial clog, or have too much carbon buildup on piston heads. How many miles do you have in the car? And when was the spark plugs replaced? Also, filling up with top tier gas will keep the engine cleaner and running smoother over time. Top tier gas are found at Shell, Mobile, Costco, etc. depending on your answer I have additional suggestions.
Also, are you burning oil? I use Lucas fuel injector cleaner every few months to keep the fuel injectors clean.
After cleaning both the throttle body and the MAF sensor, some codes popped up. So I used an OBD scanner tool to erase the codes. I don't know if the slight delay is caused by wiping out the learned values from the ECU or from cleaning out the throttle body. Before, I noticed that the throttle was more responsive, but after cleaning, I noticed that it would take a second or two after pressing on the pedals all the way before I could feel the hard acceleration. However, I recently bought the car for 95,000 miles. I have no idea how the previous owner serviced the car, but I decided to give it a tune up. I replaced the air filter with a K&N filter and added the Lucas Fuel Injector (like you mentioned). I would like to change out my sparkplugs, but I have a 2GR-FE engine. Getting those sparkplugs in the back seems like a hassle, so I might just get a mechanic to install it for me.
@@Kim-gw6jv here is a video on 2grfe spark plug change. It’s little bit hassle to get to back plugs but there is no complex or tricky step.
After TB and MAF cleaning, it takes little bit of driving for ECU to learn the best air/fuel mixture. In fact, ECU is constantly monitoring and making adjustments. At near 100K, you are due for spark plug change. Be aware that Amazon and eBay have cheaper but fake OEM plugs. Avoid those and only buy from a reputable auto parts store. And get the exact match as slight difference in firing cause misfire in these engines.
@@Kim-gw6jv Also keep a close eye on the oil level and see if it’s burning oil. Best way to do this fill the oil the top mark and drive 1000 miles and see how much it went down. I just drove 2200 round trip to Chicago on my 2013 Camry and it burned only 1/3 quart, which is excellent. Burning oil could indicate other problems like carbon buildup on piston and not efficient combustion.
I did this and now I have codes p0102 and p0113 now
It’s mainly due to cleaning spray getting into engine but that burns off within minutes. Also, depending on how dirty your MAF and TB were, after cleaning car’s computer needs time to make adjustment. Just drive normally for a day or two and it’ll go away once computer adjusts to cleaned TB and MAF signals.
Yes I tried driving it for 30minutes but the codes would still show up. I will continue to drive under normal conditions for two days and see if that goes away
What is the second sensor you disconnected?
At what time mark connector are you referring to?
@@DIYLifeSkills At the four minute mark. Just behind the MAF.
@@cmhwilder I try to find name but I can’t. But since it has a vacuum hose connected to it, must be some sort of vacuum valve control
@DIYLifeSkills thanks. If I find out I will reply with it
Vapor canister purge solenoid.
I tried this on my 2014 Camry and I’m still idling at around 1200 rpm’s. Any clue why it won’t relearn the idle? I even tried disconnecting the negative battery terminal.
How many miles do you have?
How long have had this symptom?
How long have you had this car?
@@DIYLifeSkills 105k, just cleaned the throttle and MAF today. About 2 years with the car.
@@DIYLifeSkills I’m going to try to reset it again tomorrow morning. Can I still drive the car? To and from work?
@@joshrocks323 It's normal for car to idle high on cold start and then gradually come down to 600-700 range as the car warms up. Is it idling high even after driving for few minutes when you come to a stop?
@@joshrocks323 If the high idle is only in parked or neutral position at stop, and it is not misfiring and it's not running rough other than slightly higher RPM, and then it drops to normal RPM while driving, then it should be OK to drive. What symptoms were you having that led to MAF & TB cleaning? Also at 105K miles, you are due for spark plugs and PCV change as well. Has that been done? Also, when you get a chance, remove the air intake and take a close peak at the TB plate. It should be only slightly like 1/16" open.
Is this a 4-cylinder or v6?
4cyl
do not push the butterfly by hand it will be mess up your aceleration idle, get someone push pedal to do so
That’s a myth for Toyota/Lexus cars as sensors only come into play when the engine is started. Car has no idea the plate opened and closed. And ECU constantly adjusts the plate opening based on all the air and fuel mixture ratio signatures compiled from MAF, oxygen sensor, RPM, etc.
What about manual transmission
Transmission is to shift gears, and that's totally separate from TB & MAF that controls how much air is mixed with gas for optimal combustion. So manual trans also need to clean TB & MAF regularly.
@@DIYLifeSkills how can i make idle relearn for car with manual transmission ?
@@hebaabdallah3518 Use the relearn steps in 16:56 . To put in drive, simply put in first gear while pressing on the brake.
This is to expedite the idle relearn, if you drive the car, the car will relearn automatically eventually.
Using a micro fiber towel shouldnt be used cleaning inside the throttle body it will release fine materials as I even seen in this video happening falling into the throttle body, best to use red mechanics rags.
I wouldn’t worry about micro fiber particles coming out. You are doing this with no vacuum, so after you wet the TB plate with cleaning solution, just wipe away. And microfiber does better job at picking up more carbon and leave the surface clean. Definitely do not use old rag on this.
Background music was unnecessary but thanks for sharing your knowledge.
Your a struggling Mechanic lol thanks!
I’m no mechanic. I’m just a DIY money saver. :-)
Tldr, it didn't need cleaning.
Not easy job 😮😅
Oh this is one of the easy DIY you can do at home without special tools. :-)
That TB is too much of a PITA! Forget it! Good video though! You might be better off using Q tips to clean the area!
Little bit hidden inside but it’s really not too bad. All steps are straightforward without much complication.
@@DIYLifeSkills It's much more of a PITA on my wife's 2011 Highlander with the 2.7L 4 cylinder. It's even further down with more hoses and crap to disconnect. DIYLifeSkills, can you please do a video this job on a Highlander or Venza with the 2.7L?
Thank you very much!!!
Is that the menu music from NBA street? Lol
It’s actually a free music from TH-cam called “Toe Jam”. You can see full description that TH-cam automatically adds to video description. Due to licensing issues, TH-cam checks all music included int the video, so I can only use that TH-cam provides as free music. :-)