finally…someone who takes the time to explain the code reader and what the values actually mean. Thanks. I have a 2007 vibe running too lean and this diagnostic really helps. Thanks again!
You sir is what we can call a master mechanic, you have a way to explaining things that make sense and walk us through it, and testing and why. You have me waiting to watch more. Thanks for helps us learn! Don’t change!!!
Very well explained in a way that non-tech owners can understand and, more importantly, fix on their own at little or no cost. Thank you for sharing this Jem.
Hi K Du thanks again for a great demonstration on how to trace and repair fuel trim problems you’ve been very practical and to the point I’m learning a lot from your videos and very impressed with yoy Autel thanks again and be safe
I agree with other comments about your ability to explain the scan tool data. Very logical and understandable explanations. Excellent .. now a subscriber.
Thanks again body, nobody explains and troubleshoots like you, very sample to understand for DIY, I suggest you to open a teaching shop, I’ll be your first alumni, but unfortunately you are little bit to faraway from me, but your videos are a masterclass to learn. Thank you thank you.
One of the best diagnosis video deserve million hits I have AF sensor 4V this means leans mean more air or less fuel So the STFT and LTFT are low and when I add they are nearly 0 The post Cat oxygen sensor is like 0.9V constant when I rev up it starts jumping here and there Any ideas mate what is happening I have checked the fuel pressure it was in limit Cleaned the injectors Using techstream for diagnosis
@@KITS_Auto_and_Truck_Repair Thanks there is no code what I notice B1S1 is like 4V should b 3.3V LTFT 9% STFT 3% I will upload the idle and 3000 rpm data
Hi Professor. I Paid $600 On My 2002 Ford E-250 .4.2 Engine. Engine Is Clean. I Had Codes P0171 And P0174. The Engine Was Good For A Week. The Code P0171 Came Back On. Were Are You Located. Im Tired Of Being Ripped Off.
Hello,I had my hi pressure fuel pump install with the intake gasket also my ? is that my stft is 2.3 on both banks an my ltft or at -14 on both banks drove like 150 miles to see if it return to 10 or under 10 but it stay on the ltft on -14 I don’t know if they did a relearn or what thank you please respond nice video of removing the transmission
Thanks for your educational videos, may I know the best reading of MAF sensor for Corolla 2001 Short term and long term, because numbers stays 1.05 both Short and Long term. I really appreciate your help.
@kaaraa-mardha1977 My Pleasure! you should have 10% plus or minus total trim short term plus long term! and MAF should be around 1.9g/s on a 1.8L Engine!
Hey Boss, i sent you an email i want to set up an appointment. i'm having the same issues with this headache P0171 code, it doesn't want to go away i had 2 shops change spark plugs (that fixed me from stalling out while idling) and installed OEM MAF (check engine light still comes back on with same P0171 code) the shop recommends to check my fuel pump which i think is a waste in & out the shop is starting to cost allot on my end when the problem isn't getting fixed. my emissions is coming up soon and i know i'll definitely fail due to check engine light being on. please get back to me and hopefully we can set up a appointment.
@imdyair Hello! Thanks for reaching out, we sent you our shop phone number via email, you can call us to set up an appointment, We're looking forward to connecting with you!
Not a mechanic--I just have 2X 2005 Corollas... Does a P420 automatically mean the catalytic converter has to be replaced? I am reading that it does not and I would say in this case the catalytic converter is still good especially if they were not riding around for a super long time with the leak at the PCV hose... In my opinion, this mechanic did well but SHOULD NOT replace the catalytic converter unless there is an indication that it is fully defective. I would tell him thanks for finding the leak now I will run a catalytic converter cleaner through my gas tank--perhaps more than once close together...
I have a 2006 dodge stratus 2.4L . On 12/03/23 i put on a valve cover gasket and one nut will not go back in , so i be not put it in, so the code came on today the code is P0171 came on 01/05/24 if i fix it , firestone work on my car fast
Sir, youre a great instructor. Your explanation of the fuel trims helped me fix my vacuum leak. It was the fuel injector O-rings causing my bank 1 to go lean. I replaced the O-rings and my fuel trims are now at 4.7 and 4.7. No more dash light. Thanks again sir!
My truck has this code we have replaced both 02 sensors, iat sensor, fuel injectors, fuel filter, fuel pump, head gasket and did smoke test and still not fixed
You are a professional ASE Tech. You are what all Techs should be like. Honest. Never upsetting. Just good to the core. I wish I can find an honest shop that determines what needs to be repaired and helps out if its an easy job and not upselling.
I don't care what anyone say these IAC throws a p0174 and a p0171 code, I unplug this IAC while my engine is running the car stalls right out, I reconnect the wires and start the engine the car cough like crazy before and catches itself b4 it stall out, the the engine is starving for fuel but this IAC is letting into much air. My car goes into limp mode when starting off the computer trying to make up the lack of fuel under a load so tranny kick into limp mode because of the lack of vacuum and my engine revs up to kick it into 2nd gear, I really misses the 2 and 4 barrels holly carbs these emission controls are junk, you running around like crazy to figure out the issue
In this video, friend, what was the problem with the catalyst? Was it covered or what? Another question, was the air mass sensor okay for you? I think it had a very high measurement because that car has 4 cylinders and closer to 1800g/s would be the best
It's 6am I'm watching this.. I work on Benz primarily and got a camry with this code. Your information was great I will apply this diag to the camry to help me . Thank you
I have a code because my check engine light is on. It is P015A o2 sensor delayed response rich to lean. Is replacing this easy to do? I have 2015 chevy malibu
I’ve had this code (P0171) in my 2006 Camry since I bought it. 280k miles. This is the only code that ever gets tripped and my BlueDriver says this is the only code confirmed. My live data shows the LTFT on Bank 1 being high at idle and then smoothing out some while driving. STFT on Bank 1 being very close to and sometimes at 0% while idling then higher while driving. Something else I found suspicious was the live data showing the Absolute Throttle Postion being high. It reads at 16% or so at idle then jumps all the way up to 27% while driving and fluctuates between those two numbers while driving. I’ve replaced the MAF sensor, engine air filter, fuel filter and fuel pump. What could it be? This car has had some exhaust system work done to it previously I was told but it does not have any other codes nor does it make excess noise. What does the absolute throttle position sensor being high indicate and what ultimately is causing my lean condition? Please help if possible. I’d like to fix it because that’s the only thing wrong with this car’s system right now and it runs and rides great otherwise.
Good job there. I was asking what would cause a vvti engine to have hard start. No trouble code stored. Fuel pressure is reading at 40000psi. Please help
I have been chasing the po171 and po 325 knock sensor code. The vehicle i am restoring is a 98 Nissan altima GXE. I had a po440 and a po 1138 i believe. I replaced the evap hose's. And that fixed the evap codes. I am now tracking down the massive vacuum leak. The short term fuel trim is + 20 to 25 percent. The long term is and stays about 10 percent. I changed the 02 sensors map and maf sensors. The fuel trims on the road is totally normal indicating a vacuum leak. I changed those sensors as maintainance because of the car age. The PCV and intake bellows are next suspects. This was a good video.
I’d leave the catalytic converter alone as the efficiency code could be due to the lean conditions 🤔 Have the customer drive it and if it returns, then replace the cat.
@@KITS_Auto_and_Truck_Repair could you of tested the cat by doing a, back pressure gage test, hooked to the upstream O2? if its under 2 lbs at idle it should be fine.. s
Way too much pressure!! You're going to blow out pressure sensor!! No emission hoses?? Vent hose from the tank to air cleaner is first place to look....
Dear. It's me Aladdin from Jordan. I problem with my oxygen sensor fuse for my Jeep Grand Cherokee - California 2002 4.7 4x4. I am facing a problem now in determining the colors of the sensor coming out from the car, as the colors are (red - red/white - black - black/white). I had bought a new sensor oxygen with colors (white - white - black - blue). So, can you help me with how to connect the wires to the new sensor? All problem in bank 2 sensor 1 and 2
@@KITS_Auto_and_Truck_Repair Much appreciated sir for your help. but i tried this befor and didnt work. can you diagram the color comes from the car side
K diagnostic thanks for such an informative cool video, you are truly a professional tech with excellent diagnostic skills, my years in automotive as a SAE certified tech back in the day was filled with learning as much as possible so I could be the best tech possible just like you, another way to check for vacuum leaks due to lean running is to use propane gas around the engine as it's running, when you hit the spot where the leak is the engine will Rev up high as long as you keep the propane gas in that spot, we used to do that in the 80's to find vacuum leaks. Love the Video and your expertise, much respect
@@KITS_Auto_and_Truck_Repair just remembered something else, the EGR Valve is only suppose to open during open throttle and when cruising but at idle it's suppose to close so it doesn't make the car run too lean, but the symptoms would be that the car runs fine when cruising but would shut off at idle cause the EGR valve would stay stuck open and lean out fuel system at idle...don't know if that's a problem with the cars nowadays with all the new technology and computer controls
@@KITS_Auto_and_Truck_Repair I had my nephews 2007 corolla towed home, I scanned it and got this same lean code , I found no vacuum leak but I took 3 spark plugs out and found the plug tips soaked with oil and combustion chamber has oil in it on 3 cylinders, 4th cylinder and plug is dry, didn't do compression test yet but what could it be?..the combustion chamber suppose to be sealed so how can oil soak tip of plugs and get into chamber? Rings? Head gasket? If it's real bad he's just gonna get a new car but I just wanted your expertise on this.
Thanks for your video. Obviously there was a vacuum leak at the PCV hose connector. I also think there are additional problems. I would put a fuel pressure gauge to monitor fuel pressure a idle and at load. In addition. a fuel injector "drop test" to monitor for clogged fuel injectors. My concern was as you increased RPMs past idle, the positive LT FT started increasing. Also , the MAF sensor seemed Skewed a little in the positive direction, as mentioned at idle with a 1.8 L engine MAF should read ~ 1.8 G/s. Also, I would recommend an oil change to the customer since the high fuel trims may have fuel to the engine oil. Once again thanks for your video.
FAUSTO GONZALEZ Thanks for your input!! There was no need to check all of those components since the fuel trim numbers got better after fixing the vacuum leak at the PCV tube, I like the idea of doing an oil change afterwards!!
@pramaeshram10 sure! you can bring the car to our shop and we can diagnose it for you! you can send me an email at kitsautoandtruckrepair@gmail.com for shop info!
I have a permanent p0420 code and pending/history p0171 code. Car is v6, Bank 1 Sensor 2 is behaving closely to Sensor 1. Sensor 1 was replaced, sensor 2 was not. Could the downstream o2 be the issue? Or is it the catalytic converter?
good videos, congratulations, engineer... a question, if I have a problem with the injectors, do the MAF sensor values go up or down? because I have a toyota corolla with that same code and with the scanner the maf sensor has a reading of 1,620 gm/s in realenti
hardest code to fix. good video TU but only on youtube it's always cracked intake boot ot a hose or bad MAF.never this EZ.have a P0171 on sentra that's been kicking my A** the last 3 months working on it on and off . code from hell and chinese made parts don't help.
@rayp.454 Pumping the Brake pedal at idle on a vehicle that has a vacuum operated brake booster will create a vacuum leak in the intake, which will affect the 02 sensor reading, since there is atmospheric pressure / Air on the other side of the brake booster!
I have a 04 camery i got that p0l71 code but not the catalytic converter 420 code mine say could be vacuum leak or inlet hose loose. if i fix those 2 problems will check engine fo out please help🙏🏾 thanks 😊
Excellent video, I have learned so much from this, you are a professional and did it all with a camera in one hand, so as the saying goes you could do this job with one hand tied behind your back !!!👌👌
What are the signs and symptoms of this code P0171- system too lean (bank 1)? What will be the likely problem or issue with the vehicle with this code? Thanks. Great tutorial ❤❤❤
This was a simple method, with clear explanations of your rationale behind every step. Thanks for uploading. It gave confidence that the issue I'm facing with my truck is a vacuum leak. I'm about to make a DIY smoke machine and trace the problem spot.
K you did an excellent job...my car has the same error minus the P420(the cat was replaced a year ago) The PO171 is something new I hope once I clean the MAF, That ista a simple vacuum leak that can fix!! Thank you
The Smoke Test really helps a lot, the basic and simple way of trouble shooting the problem accurately. rather that spending parts while doing trial and error. It really helps alot in saving money. Thanks alot.
@@KITS_Auto_and_Truck_Repair it can take SEVERAL DRIVING CLYCLES to clear the code. If you would have cleared the Code, and then started the Vehicle; it may have yielded more information- such as if the code was Actually Cleared or if the Engine Light would have Reappeared with the code. In My Opinion, your video lacks Confirmation; and Stops short on the Actual Diagnosis- with an Assumption!~
I have code p0171 lean bank 1 & P0171 lean bank 1 pending also right now. On a Scion tC 2006 MAF, air filter and oxygen sensor replaced (needed to be done anyways). My reading for my 02 sensor (Bank 1) reads at Volt output 0.740 to 8.00(v) My 02b1s1 says n/a? I know it's suppose to show as AF for Toyotas but didnt see that one at all. my EQ_RATB1S1 read at 1.002 with rpm at 2800-3000. My shorttf1 after warm up in idle 2.6 longft1 is 32.1 Rpm 2800-300 shortft1 moves -3.9 to 1.6 Longft1 stays at about 24% I cant tell if there is a vac leak, 02 is bad, fuel injectors/spark plugs bad or fuel pump. From my readings I cant tell what they mean... vac leak, fuel pump or 02 sensor Any advice? Side note the last 2 days just started with idle issue, hesitant when I press on the gas pedal. My throttle reads at 18% which is where I believe it should be.
@@KITS_Auto_and_Truck_Repair Oh real quick to I changed the MAF sensor 4 days ago not oem an auto zone brand. the next time I started my car and drove after I put the new one in is when I noticed idle issues and gas pedal hesitation after being stop.I know Scion (Toyotas) are sensitive to non dealer parts. I saved my one I took out should I clean it and put it back in and see if at least the idle issue its as bad. Or would that have nothing to do with it. Just weird CEL on for about a month (trying to fix the issue) with no drivable issues or idle hesitation
Dude, this video should have millions of views, I just learned something that you don't in the school, today, valuable information. Thank you so much. Bless.
That was one of the many codes on my 2003 Chevy Express 3500 LT. Had a permanent MISFIRE also for years. Just wrapping up an reman engine swap that i got from AutoZone and discovered some bolts on both my exhaust manifolds were broken clean off and there was lots of carbon residue on the sides of the engine. I'm assuming i was sucking air at this point. Before this discovery I changed spark plugs, plug wires, ignition coils and O2 sensors to no avail. Even did a live scan one time and one of the O2 sensors were pulling 0.015 v. Oh. The engine never went into closed loop. EVER. I'm a driveway mechanic so i learn a lot of things the hard way. Thank you for your video, you Kind Man. SUBSCRIBED!
i watch your video again to understand lean condition pumping brake vacuum booster at idle how you creating unmeter air one side of diaframe is atmosfering pressure and other is vacuum from engine and check valve pumping the brake you compressing vacuum in to engine and then sucking vacuum back how those it work can you explane please thanks
Paul Foldes there is atmospheric pressure in the other side of the brake booster, when pumping the brake pedal while the engine is idling unmetered air leaks into the vacuum chamber through the push rod and eventually into the intake manifold which causes a lean condition
Thanks for the simple explanation without using unnecessary and confusing terminology. You were a big help with diagnostic info I can look for using my equipment. Keep up the Great work ! 🎉
What could be the cause of a P0171 on a 2016 Jeep Patriot Latitude 2.0 we just replaced the MAP sensor but the vehicle still has a rough idle and the rpms run high while driving on the freeway approximately 65-70 mph the rpms are jumping up to 2200-2700 rpms. What could cause that? My husband already checked for vacuum leaks and says he can't find any obvious leaks. We just replaced the map sensor thinking that would fix it but it didn't so I'm thinking it could possibly be a bad Throttle Body w/Actuator IAC Idle Air Control or a TPS Position Sensor or even possibly a upstream 02 sensor. If anyone else can give me some advice on what I should fix next I would greatly appreciate it thank you!
Excellent video. Being an I/E Journeyman I know good troubleshooting using diagnostic equipment together with "experience". Great job. Kinda wish I had your scanner & smoke machine. Folks need to know why cost of repairs are high. Equipment & experience are worth the money. Easter egging expensive part are not the road to travel. Again, thank you for video. Subscribed!
Love the vid, I had the same issue. Cracked hose, I wouldn’t have caught it if it wasn’t for you. Thank and again great video!!!!Thank you 👍🏼🤛🏼🤘🏼. PS I have the exact same car and color 😆 I knew right then I had found the right tutorial 👍🏼
@505fastlife6 there is vacuum on one side of the brake booster and atmospheric pressure on the other side, when you pump the brake pedal you allow air to enter the vacuum side which causes a lean condition!
My 2005 toyota Highlander had this code before, now its gone, but no power i replaced throttle body, vacuum hose, fuel injectors, spark plugs, and still not power even i replaced fuel pump. Please help how can i test catalytic converter?
AWESOME, video, Thank you so much for your kind honest and simple walk through, if only 'other' so called techy's would get half as good as you, Sir, i salute you, please keep posting more, LEGEND, 😇
@@KITS_Auto_and_Truck_Repair i am seriously 'disturbed' i want to know why you have only 21.9 subscribers?? you should have at least 4 BILLION !! and everyone on this planet who are so called 'Mechanic/ techy's should have 'viewed this video at least 40 times,,, a day !! 🙂KEEP UP THE GREAT WORK, BROTHER 😎😇👍
I have same car, 160k miles. 6 shops could not fix this problem. Took to Toyota dealership for new intake manifold gasket and MAF sensor. Fixed problem. That was last year. Code is back, spent $600 on spark plugs, valve cover gaskets, gas cleaner, throttle seal. Code came back next day. Now this mechanic has my car for two days now, says he has to call a Toyota technician 😡
Brother hope you don’t get tired of me, but these are some excellent videos I learn so much. question. I have a Autel Maxi com808 basic I ran a diagnostic on a mini Cooper 2016 and I don’t see any short term or long term fuel trim on it
Thank you so much for this detailed video. I have a toyota prius 2007 that recently triggered this code (System too lean bank 1), but I'm unsure if it's related to a vacuum leak. I mainly saw mention in my code reader - Air Induction system, injector blockage, and mass air flow meter. I'm getting a STFT B1(%) of -2.3, LTFT B1(%) 33.6 at engine rpm of 3922 with Vehicle speed of 75. The numbers should be much lower at that speed right? What's odd is that I didn't exactly see a serious drop in fuel economy, it actually got better after I changed out my brakes, 35 -> 39 mph. I was thinking of trying to first add fuel injector oil into my gas tank to see if that would be a easy fix. Any thoughts on this would be much appreciated. Thank you for your time.
![Engine Fault Code P0171 - System Too Lean Bank 1! [Symptoms, Causes, and Fixes]](http://i.ytimg.com/vi/U3JVc3VLahA/mqdefault.jpg)
You have a gift of explaining things with simplicity,don't change.Thank you so much.
Willie Johnson My Pleasure! I appreciate it!
Think the same here!!!
finally…someone who takes the time to explain the code reader and what the values actually mean. Thanks.
I have a 2007 vibe running too lean and this diagnostic really helps. Thanks again!
M Kay My Pleasure! Thanks
You sir is what we can call a master mechanic, you have a way to explaining things that make sense and walk us through it, and testing and why. You have me waiting to watch more. Thanks for helps us learn! Don’t change!!!
Lidia Santos Thank you very much! I appreciate you!!
I have both - P0420 and P0171 don't know. This video was amazing!!!!! Thank you!!!!!!!!!!
Chris Delgado My Pleasure!! I'm glad to hear that the video was helpful!!
Very well explained in a way that non-tech owners can understand and, more importantly, fix on their own at little or no cost. Thank you for sharing this Jem.
@tomthumb3085 My Pleasure!
Mini un
Unni
Hi K Du thanks again for a great demonstration on how to trace and repair fuel trim problems you’ve been very practical and to the point I’m learning a lot from your videos and very impressed with yoy Autel thanks again and be safe
Rafiek Ahmed Thank you!! I'm glad to hear that you're enjoying the videos!!
I agree with other comments about your ability to explain the scan tool data. Very logical and understandable explanations. Excellent .. now a subscriber.
Robert Qman Thank you! and welcome to our youtube community!
Thanks again body, nobody explains and troubleshoots like you, very sample to understand for DIY, I suggest you to open a teaching shop, I’ll be your first alumni, but unfortunately you are little bit to faraway from me, but your videos are a masterclass to learn. Thank you thank you.
@melaniopimentel6189 My Pleasure! Thanks
I like the video very good, but I like these numbers
@allenprine3751 Thanks!
One of the best diagnosis video deserve million hits
I have AF sensor 4V this means leans mean more air or less fuel
So the STFT and LTFT are low and when I add they are nearly 0
The post Cat oxygen sensor is like 0.9V constant when I rev up it starts jumping here and there
Any ideas mate what is happening
I have checked the fuel pressure it was in limit
Cleaned the injectors
Using techstream for diagnosis
@mikmik7033 what code do you have in memory and how low are your fuel trim numbers at idle!
@@KITS_Auto_and_Truck_Repair
Thanks there is no code what I notice B1S1 is like 4V should b 3.3V
LTFT 9%
STFT 3%
I will upload the idle and 3000 rpm data
I have run the odb tool 0n idle and 3000rpm but I am unable to upload here
Hi Professor. I Paid $600 On My 2002 Ford E-250 .4.2 Engine. Engine Is Clean. I Had Codes P0171 And P0174. The Engine Was Good For A Week. The Code P0171 Came Back On. Were Are You Located. Im Tired Of Being Ripped Off.
@jimstools3937 Hello! I'm located in Dickerson MD, you can email me at kitsautoandtruckrepair@gmail.com for shop info!
Hello,I had my hi pressure fuel pump install with the intake gasket also my ? is that my stft is 2.3 on both banks an my ltft or at -14 on both banks drove like 150 miles to see if it return to 10 or under 10 but it stay on the ltft on -14 I don’t know if they did a relearn or what thank you please respond nice video of removing the transmission
@simonflores3410 These numbers don't look too bad! is the check engine light on?
@@KITS_Auto_and_Truck_Repair no check engine lite on,or no freeze frame
@@KITS_Auto_and_Truck_Repair also ltft went up to -16 -18 on both bank
Thanks for your educational videos, may I know the best reading of MAF sensor for Corolla 2001 Short term and long term, because numbers stays 1.05 both Short and Long term. I really appreciate your help.
@kaaraa-mardha1977 My Pleasure! you should have 10% plus or minus total trim short term plus long term! and MAF should be around 1.9g/s on a 1.8L Engine!
Hey Boss, i sent you an email i want to set up an appointment. i'm having the same issues with this headache P0171 code, it doesn't want to go away i had 2 shops change spark plugs (that fixed me from stalling out while idling) and installed OEM MAF (check engine light still comes back on with same P0171 code) the shop recommends to check my fuel pump which i think is a waste in & out the shop is starting to cost allot on my end when the problem isn't getting fixed. my emissions is coming up soon and i know i'll definitely fail due to check engine light being on. please get back to me and hopefully we can set up a appointment.
@imdyair Hello! Thanks for reaching out, we sent you our shop phone number via email, you can call us to set up an appointment, We're looking forward to connecting with you!
Not a mechanic--I just have 2X 2005 Corollas... Does a P420 automatically mean the catalytic converter has to be replaced? I am reading that it does not and I would say in this case the catalytic converter is still good especially if they were not riding around for a super long time with the leak at the PCV hose... In my opinion, this mechanic did well but SHOULD NOT replace the catalytic converter unless there is an indication that it is fully defective. I would tell him thanks for finding the leak now I will run a catalytic converter cleaner through my gas tank--perhaps more than once close together...
@rickgarcia239 Those cat cleaners don't usually work from my experience!
I have a 2006 dodge stratus 2.4L . On 12/03/23 i put on a valve cover gasket and one nut will not go back in , so i be not put it in, so the code came on today the code is P0171 came on 01/05/24 if i fix it , firestone work on my car fast
@timothybarren6520 Good!
Sir, youre a great instructor. Your explanation of the fuel trims helped me fix my vacuum leak. It was the fuel injector O-rings causing my bank 1 to go lean. I replaced the O-rings and my fuel trims are now at 4.7 and 4.7. No more dash light. Thanks again sir!
likits1999 My Pleasure!! and thank you for letting me about experience, I'm glad to hear that the video was helpful!!
My truck has this code we have replaced both 02 sensors, iat sensor, fuel injectors, fuel filter, fuel pump, head gasket and did smoke test and still not fixed
@user-pg3cx2nz4b That's odd! what year is it?
You are a professional ASE Tech. You are what all Techs should be like. Honest. Never upsetting. Just good to the core. I wish I can find an honest shop that determines what needs to be repaired and helps out if its an easy job and not upselling.
Terii Pearson Thank you!
If the numbers pleased you... Why replacing the CAT for???
@luisesco3517 The Customer told me that the engine had a bad misfire in the past! but it was all good and the car was fixed!
As i know MAF should be not lower but higher than 3g/sec for 1.8 at idle and for >3000rpm maf is 13g/sec.. Very low.
@ltk777 it depends!
I don't care what anyone say these IAC throws a p0174 and a p0171 code, I unplug this IAC while my engine is running the car stalls right out, I reconnect the wires and start the engine the car cough like crazy before and catches itself b4 it stall out, the the engine is starving for fuel but this IAC is letting into much air. My car goes into limp mode when starting off the computer trying to make up the lack of fuel under a load so tranny kick into limp mode because of the lack of vacuum and my engine revs up to kick it into 2nd gear, I really misses the 2 and 4 barrels holly carbs these emission controls are junk, you running around like crazy to figure out the issue
@chuckychuck Defective IAC valves can cause some bad symptoms!!
In this video, friend, what was the problem with the catalyst? Was it covered or what? Another question, was the air mass sensor okay for you? I think it had a very high measurement because that car has 4 cylinders and closer to 1800g/s would be the best
@poitevienphilip The mass air flow sensor was good! the cat didn't get replaced!
K D u make my day , very good explanation video, May God blessed you, now I staydy learn numbers and rich numbers very well. Habib Auto
Suleman Habib Thanks my Brother I'm glad to hear that the videos have been helpful
Excellent explanations, thank you very much. Good bye.😅
@adriasihudson157 My Pleasure!
It's 6am I'm watching this.. I work on Benz primarily and got a camry with this code. Your information was great I will apply this diag to the camry to help me . Thank you
John Smith My Pleasure! I'm glad to hear that the video was helpful!
I have a code because my check engine light is on. It is P015A o2 sensor delayed response rich to lean. Is replacing this easy to do? I have 2015 chevy malibu
@Yo_Caliiii it should be pretty easy to replace!
I’ve had this code (P0171) in my 2006 Camry since I bought it. 280k miles. This is the only code that ever gets tripped and my BlueDriver says this is the only code confirmed. My live data shows the LTFT on Bank 1 being high at idle and then smoothing out some while driving. STFT on Bank 1 being very close to and sometimes at 0% while idling then higher while driving.
Something else I found suspicious was the live data showing the Absolute Throttle Postion being high. It reads at 16% or so at idle then jumps all the way up to 27% while driving and fluctuates between those two numbers while driving.
I’ve replaced the MAF sensor, engine air filter, fuel filter and fuel pump. What could it be? This car has had some exhaust system work done to it previously I was told but it does not have any other codes nor does it make excess noise. What does the absolute throttle position sensor being high indicate and what ultimately is causing my lean condition? Please help if possible. I’d like to fix it because that’s the only thing wrong with this car’s system right now and it runs and rides great otherwise.
@gbowers Check your 02 Sensors
What does absolute throttle position being high on my car mean about this?
I have a on again, off again P0296 code. Is this similar to a 0171 code? Engine runs fine, no noticeable issues
@kalani1987 Yes!
My friend ever since I changed injectors po171 coming car power much better pick up much faster
barry raoufi That's good to hear!
Good job there. I was asking what would cause a vvti engine to have hard start. No trouble code stored. Fuel pressure is reading at 40000psi. Please help
@patrickndungu2775 partially clogged injectors! I recommend you take it to a pro mechanic who can diagnose it for you!
I have been chasing the po171 and po 325 knock sensor code.
The vehicle i am restoring is a 98 Nissan altima GXE.
I had a po440 and a po 1138 i believe.
I replaced the evap hose's.
And that fixed the evap codes.
I am now tracking down the massive vacuum leak.
The short term fuel trim is + 20 to 25 percent.
The long term is and stays about 10 percent.
I changed the 02 sensors map and maf sensors.
The fuel trims on the road is totally normal indicating a vacuum leak.
I changed those sensors as maintainance because of the car age.
The PCV and intake bellows are next suspects.
This was a good video.
@michaelhoward4020 Thank you! Good luck with your project!
I’d leave the catalytic converter alone as the efficiency code could be due to the lean conditions 🤔
Have the customer drive it and if it returns, then replace the cat.
turbo8711 Yes the cat trouble code came back when I test drove the vehicle, I replaced it and all was well!
@@KITS_Auto_and_Truck_Repair could you of tested the cat by doing a, back pressure gage test, hooked to the upstream O2? if its under 2 lbs at idle it should be fine.. s
@@daytonpyro Yeah a back pressure test is also valid!
Way too much pressure!! You're going to blow out pressure sensor!! No emission hoses?? Vent hose from the tank to air cleaner is first place to look....
@lard1892 what pressure sensor?
Dear.
It's me Aladdin from Jordan.
I problem with my oxygen sensor fuse for my Jeep Grand Cherokee - California 2002 4.7 4x4.
I am facing a problem now in determining the colors of the sensor coming out from the car, as the colors are (red - red/white - black - black/white).
I had bought a new sensor oxygen with colors (white - white - black - blue).
So, can you help me with how to connect the wires to the new sensor?
All problem in bank 2 sensor 1 and 2
@aladdinalqurnha846 match the wires based on the old sensor connector, connect one wire at a time!
@@KITS_Auto_and_Truck_Repair Much appreciated sir for your help.
but i tried this befor and didnt work. can you diagram the color comes from the car side
Lovely video and very well explained. Please, which diagnostics app are you using?
@bryanrobertsng Thanks! I used my snapon zeus scanner in this video!
Wow.. Thank you so much. Honestly , You are just too good in your field. Plus one follower today...
Ola Olot My Pleasure! I appreciate it and welcome to our youtube community!
Longterm is always 20 never change.which sensor is it ?thanks in advance
@a.k1944 if your fuel trim numbers don't change regardless of engine speed, check your fuel pressure and MAF sensor!
If I don't have access to smoke machine, how can I find the leak? i tried spray carb cleaner but couldn't find it
@hasankhurshid2632 it's gonna be hard to find the leak if there is a pin hole somewhere, try soapy water!
Hi good mechanic,
Where are you physically located? I want to bring my car to you?
aklilu mesfin Hi I'm located in Dickerson MD, you can Email me at Deo@calleva.org for shop info!
K diagnostic thanks for such an informative cool video, you are truly a professional tech with excellent diagnostic skills, my years in automotive as a SAE certified tech back in the day was filled with learning as much as possible so I could be the best tech possible just like you, another way to check for vacuum leaks due to lean running is to use propane gas around the engine as it's running, when you hit the spot where the leak is the engine will Rev up high as long as you keep the propane gas in that spot, we used to do that in the 80's to find vacuum leaks. Love the Video and your expertise, much respect
TheMrchris1234 My Pleasure! and thank you for sharing the propane method of finding a vacuum lean!
@@KITS_Auto_and_Truck_Repair just remembered something else, the EGR Valve is only suppose to open during open throttle and when cruising but at idle it's suppose to close so it doesn't make the car run too lean, but the symptoms would be that the car runs fine when cruising but would shut off at idle cause the EGR valve would stay stuck open and lean out fuel system at idle...don't know if that's a problem with the cars nowadays with all the new technology and computer controls
@@TheMrchris1234 Yeah! Thanks for sharing!
@@KITS_Auto_and_Truck_Repair I had my nephews 2007 corolla towed home, I scanned it and got this same lean code , I found no vacuum leak but I took 3 spark plugs out and found the plug tips soaked with oil and combustion chamber has oil in it on 3 cylinders, 4th cylinder and plug is dry, didn't do compression test yet but what could it be?..the combustion chamber suppose to be sealed so how can oil soak tip of plugs and get into chamber? Rings? Head gasket? If it's real bad he's just gonna get a new car but I just wanted your expertise on this.
@@TheMrchris1234 it's either defective piston rings or leaking valve guides!
I love the video,and I have learned something new. Thank you very much
@LateefAriyo My Pleasure!
Thanks for your video. Obviously there was a vacuum leak at the PCV hose connector. I also think there are additional problems. I would put a fuel pressure gauge to monitor fuel pressure a idle and at load. In addition. a fuel injector "drop test" to monitor for clogged fuel injectors. My concern was as you increased RPMs past idle, the positive LT FT started increasing. Also , the MAF sensor seemed Skewed a little in the positive direction, as mentioned at idle with a 1.8 L engine MAF should read ~ 1.8 G/s. Also, I would recommend an oil change to the customer since the high fuel trims may have fuel to the engine oil. Once again thanks for your video.
FAUSTO GONZALEZ Thanks for your input!! There was no need to check all of those components since the fuel trim numbers got better after fixing the vacuum leak at the PCV tube, I like the idea of doing an oil change afterwards!!
Hi can you look at my Subaru forester because I have a po139 code that no one seems to have a clue what it the fixed
@pramaeshram10 sure! you can bring the car to our shop and we can diagnose it for you! you can send me an email at kitsautoandtruckrepair@gmail.com for shop info!
I have a permanent p0420 code and pending/history p0171 code. Car is v6, Bank 1 Sensor 2 is behaving closely to Sensor 1. Sensor 1 was replaced, sensor 2 was not. Could the downstream o2 be the issue? Or is it the catalytic converter?
@c.p.5741 I recommend you have it diagnosed by a pro mechanic, the sensor or the cat could be the cause!
@@KITS_Auto_and_Truck_Repair Okay thank you!
VERY GOOD VIDEO, LOVE ❤YOUR ATTITUDE, KEEP UP THE GOOD WORK 👍🏿, MAY GOD BLESS YOU AND PROTECT YOU ❤❤❤
@lesliwells5433 Thank you!
@KITS_Auto_and_Truck_Repair IT'S A doggy dog WORLD out there,some smiling faces are dangerous, just PRAY 🙏🏿 ,Stay cool,calm, LET GOD DO the Work
You're the best that's why I'm always learning from you
@adamissah452 Thank you!!
good videos, congratulations, engineer... a question, if I have a problem with the injectors, do the MAF sensor values go up or down? because I have a toyota corolla with that same code and with the scanner the maf sensor has a reading of 1,620 gm/s in realenti
@poitevienphilip how do your fuel trim numbers look like?
@@KITS_Auto_and_Truck_Repair short range 0.781 and long range 9.375 percent
hardest code to fix. good video TU but only on youtube it's always cracked intake boot ot a hose or bad MAF.never this EZ.have a P0171 on sentra that's been kicking my A** the last 3 months working on it on and off . code from hell and chinese made parts don't help.
WV591 Thanks!!
Absolutely true......Never that easy,unfortunately.
Deo, can you explain how pumping the brake pedal changes O2 sensor readings please? Thanks for the great video.
@rayp.454 Pumping the Brake pedal at idle on a vehicle that has a vacuum operated brake booster will create a vacuum leak in the intake, which will affect the 02 sensor reading, since there is atmospheric pressure / Air on the other side of the brake booster!
@@KITS_Auto_and_Truck_Repair Makes sense, thanks Deo! I like that you respond to almost all comments. Love your channel.
Great job 10:45 where do you get the smoke machine
Calvin Thomas Thanks! I got this smoke machine from AESWAVE.COM
WOW!!!!!!!🍺🍺🍺🍺🍺🍺👍👍👍👍👍👍👍. I’m back to life so sample can’t believe….
@alexgonz5550 My Pleasure!
Thanks for the video It was very helpful ❤
@gottosahani7571 My Pleasure!
I have a 04 camery i got that p0l71 code but not the catalytic converter 420 code mine say could be vacuum leak or inlet hose loose. if i fix those 2 problems will check engine fo out please help🙏🏾 thanks 😊
@germanywho you need to have it diagnosed, someone should diagnose it for you to figure out exactly what's going on!
@KITS_Auto_and_Truck_Repair ok thanks brother 🙏🏾
Excellent video, I have learned so much from this, you are a professional and did it all with a camera in one hand, so as the saying goes you could do this job with one hand tied behind your back !!!👌👌
@kensmithmail Thank you!
This was insane!!! I appreciate the detailed work you did. I’ll update my review and let you know what happens. 👍🏼 I have a P0171 code.
Joshua Berriors My Pleasure!! Sounds good!
So what was it ? I get my CEL on my Tahoe just about every time I park and allow it to idle
What caused your p0171 code , did you figure it out and fix it? Thanks.
What caused your p0171 code ? Thanks.
Thanks i don't have vacuum leak detector.
@ToThePoint690 My Pleasure!
Great my friend , iam going to try to fix my toyota, how can i get the smoke machine? or where?👊👊
Fredy Rondon You can get it from your local tool store
What are the signs and symptoms of this code P0171- system too lean (bank 1)? What will be the likely problem or issue with the vehicle with this code? Thanks. Great tutorial ❤❤❤
Kuku Pulus Thanks! your fuel consumption is gonna increase and your catalytic converters will fail prematurely
This was a simple method, with clear explanations of your rationale behind every step. Thanks for uploading. It gave confidence that the issue I'm facing with my truck is a vacuum leak. I'm about to make a DIY smoke machine and trace the problem spot.
Fox With Tube Sox My Pleasure!! and Good Luck with your Truck!!
I got a home made smoke machine. I use it every day, if you know what I mean 😂😜👍
@@Andriig75 hooka !!?
good videos friend, ask how did you clean the maf sensor?
@poitevienphilip Thanks, you can clean the MAF Sensor with a MAF Sensor cleaner!
K you did an excellent job...my car has the same error minus the P420(the cat was replaced a year ago) The PO171 is something new I hope once I clean the MAF, That ista a simple vacuum leak that can fix!! Thank you
2ndbase My Pleasure!! Good Luck with your project !!
The Smoke Test really helps a lot, the basic and simple way of trouble shooting the problem accurately. rather that spending parts while doing trial and error. It really helps alot in saving money. Thanks alot.
@ohenry4834 My Pleasure!
I'm left wondering why you didn't clear the P0171 code?
@darrenmackay2303 it can clear itself!
@@KITS_Auto_and_Truck_Repair
it can take SEVERAL DRIVING CLYCLES to clear the code.
If you would have cleared the Code, and then started the Vehicle; it may have yielded more information- such as if the code was Actually Cleared or if the Engine Light would have Reappeared with the code.
In My Opinion, your video lacks Confirmation; and Stops short on the Actual Diagnosis- with an Assumption!~
I wish you were in Baltimore Maryland
@keithwalters8712 we are located in Dickerson MD
Excelente su ilustración. Super agradecemos ese aporte. Muchísimas bendiciones para usted y su familia.
Jorge Nuñez Thank you!
I have code p0171 lean bank 1 & P0171 lean bank 1 pending also right now. On a Scion tC 2006
MAF, air filter and oxygen sensor replaced (needed to be done anyways).
My reading for my 02 sensor (Bank 1) reads at Volt output 0.740 to 8.00(v) My 02b1s1 says n/a? I know it's suppose to show as AF for Toyotas but didnt see that one at all.
my EQ_RATB1S1 read at 1.002 with rpm at 2800-3000.
My shorttf1 after warm up in idle 2.6 longft1 is 32.1
Rpm 2800-300 shortft1 moves -3.9 to 1.6 Longft1 stays at about 24%
I cant tell if there is a vac leak, 02 is bad, fuel injectors/spark plugs bad or fuel pump. From my readings I cant tell what they mean... vac leak, fuel pump or 02 sensor Any advice?
Side note the last 2 days just started with idle issue, hesitant when I press on the gas pedal. My throttle reads at 18% which is where I believe it should be.
Little Droog do an injector flow test!
@@KITS_Auto_and_Truck_Repair Thats with a fuel pressure injector testing kit?
@@KITS_Auto_and_Truck_Repair Oh real quick to I changed the MAF sensor 4 days ago not oem an auto zone brand. the next time I started my car and drove after I put the new one in is when I noticed idle issues and gas pedal hesitation after being stop.I know Scion (Toyotas) are sensitive to non dealer parts. I saved my one I took out should I clean it and put it back in and see if at least the idle issue its as bad. Or would that have nothing to do with it. Just weird CEL on for about a month (trying to fix the issue) with no drivable issues or idle hesitation
@@Thelittledroog YES
@@Thelittledroog What codes do you in memory?
Mine was to replace the fuel pump. It fixed it.
Josey Oaks Sounds good! Thanks for sharing your fix with us!
Good job
@adamissah452 Thank you!
What type of Scanner were you using?
@ziki2152 My Autel ultra sccanner and my snapon zeus scanner!
Dude, this video should have millions of views, I just learned something that you don't in the school, today, valuable information. Thank you so much. Bless.
Elmer And Liz Gonzalez My Pleasure!! Thank you!!
Thanks man you're awesome 👌 I'm sticking to your channel 👍 😀 😉 👌
Re George My Pleasure! Thanks for being here!
That was one of the many codes on my 2003 Chevy Express 3500 LT. Had a permanent MISFIRE also for years. Just wrapping up an reman engine swap that i got from AutoZone and discovered some bolts on both my exhaust manifolds were broken clean off and there was lots of carbon residue on the sides of the engine. I'm assuming i was sucking air at this point. Before this discovery I changed spark plugs, plug wires, ignition coils and O2 sensors to no avail. Even did a live scan one time and one of the O2 sensors were pulling 0.015 v.
Oh. The engine never went into closed loop. EVER.
I'm a driveway mechanic so i learn a lot of things the hard way.
Thank you for your video, you Kind Man. SUBSCRIBED!
CHISEL CHIPPER 68 My Pleasure! and welcome to our youtube community!
i watch your video again to understand lean condition pumping brake vacuum booster at idle how you creating unmeter air one side of diaframe is atmosfering pressure and other is vacuum from engine and check valve pumping the brake you compressing vacuum in to engine and then sucking vacuum back how those it work can you explane please thanks
Paul Foldes there is atmospheric pressure in the other side of the brake booster, when pumping the brake pedal while the engine is idling unmetered air leaks into the vacuum chamber through the push rod and eventually into the intake manifold which causes a lean condition
@@KITS_Auto_and_Truck_Repair thanks for answering my question not too many do that thats why i like your video
@@paulfoldes921 My Pleasure!
Excellent video. Wish I could take my Camry to your shop!! Same code.
Noel elnolo Thank you!
Detailed information thank you
@kris182va My Pleasure!
Thank you very much, this video was a lot of help. I am having the same issues. I drive a 2004 Toyota Corolla altis.👍🏿
garfield shirley My Pleasure! I'm glad to hear that the video was helpful!
Could you give us a new video talking of the new DTC of 7 digits?
Sebastian Arriaga Sure! I will make a video about it when a vehicle with that kind of code comes around!
This code is driving me nuts
@RandomVids-hx1py follow the steps in the video to fix it!
Good information thank you very much sir ❤
@sahidulislam5296 My Pleasure!
wow! what a great video, i feel like i learned so much and i will definitely try this as i just got the P0171 code on my 06 corolla as well
Anthony Valverde Thanks! and good luck with your vehicle!!
That's good, everything you did made sense. That's obvious the cracked PVC hose.
Daniel Dupont Thank you!
Where your shop? I have the same problem.
Najla Bertin Our shop is in Dickerson MD, You can Email me at Deo@calleva.org for shop info!
Explained for even the shadetree mechanics ! 👍 great video
MayKen Thank you!!
lo p se wd😊
Thanks for the simple explanation without using unnecessary and confusing terminology. You were a big help with diagnostic info I can look for using my equipment. Keep up the Great work ! 🎉
@dougunderwood1412 My Pleasure! Thanks
What could be the cause of a P0171 on a 2016 Jeep Patriot Latitude 2.0 we just replaced the MAP sensor but the vehicle still has a rough idle and the rpms run high while driving on the freeway approximately 65-70 mph the rpms are jumping up to 2200-2700 rpms. What could cause that? My husband already checked for vacuum leaks and says he can't find any obvious leaks. We just replaced the map sensor thinking that would fix it but it didn't so I'm thinking it could possibly be a bad Throttle Body w/Actuator IAC Idle Air Control or a TPS Position Sensor or even possibly a upstream 02 sensor. If anyone else can give me some advice on what I should fix next I would greatly appreciate it thank you!
Rhonda Hanson Vasquez do you have a scan tool to watch the engine data while the engine is running?
Excellent video. Being an I/E Journeyman I know good troubleshooting using diagnostic equipment together with "experience". Great job. Kinda wish I had your scanner & smoke machine. Folks need to know why cost of repairs are high. Equipment & experience are worth the money. Easter egging expensive part are not the road to travel. Again, thank you for video. Subscribed!
@michaelbezos2969 My Pleasure! Thank you!
Great video, exceptionally helpful and very well explained. Thank you for sharing!
SquirrelsForAll My Pleasure!! Thank you!
Very thorough. Awesome work.
Love the vid, I had the same issue. Cracked hose, I wouldn’t have caught it if it wasn’t for you. Thank and again great video!!!!Thank you 👍🏼🤛🏼🤘🏼. PS I have the exact same car and color 😆 I knew right then I had found the right tutorial 👍🏼
Random AF Thank you!! I'm glad to hear that the video was helpful!!
Good morning, I have watched a lot of videos and you're by far the most informative 👍, thanks man God bless
MrPostman013 My Pleasure!! Thanks!
This guy knows his shiz
David shew Thank you!
I literally followed ur diagnostic procedures and it worked for me thanks brother
seun jason My Pleasure!! I'm glad to hear that the video was helpful!!
You’re the best may man. I’m definitely subscribing to your channel.
Vato Loco Thank you!
Good job thanks for sharing
@rogerbailey9826 My Pleasure! Thanks
Can anyone explain how pumping the brake would cause the car to run lean?
@505fastlife6 there is vacuum on one side of the brake booster and atmospheric pressure on the other side, when you pump the brake pedal you allow air to enter the vacuum side which causes a lean condition!
@@KITS_Auto_and_Truck_Repair I have never seen this done before. You sir are a master of your trade.
@@505fastlife6 Thanks!
My 2005 toyota Highlander had this code before, now its gone, but no power i replaced throttle body, vacuum hose, fuel injectors, spark plugs, and still not power even i replaced fuel pump. Please help how can i test catalytic converter?
Hector Diaz you might have plugged catalytic converters, check your exhaust back pressure! or have a pro mechanic diagnose it for you!!
AWESOME, video, Thank you so much for your kind honest and simple walk through, if only 'other' so called techy's would get half as good as you, Sir, i salute you, please keep posting more, LEGEND, 😇
Solly Khan Thank you! I appreciate it!
@@KITS_Auto_and_Truck_Repair i am seriously 'disturbed' i want to know why you have only 21.9 subscribers?? you should have at least 4 BILLION !! and everyone on this planet who are so called 'Mechanic/ techy's should have 'viewed this video at least 40 times,,, a day !! 🙂KEEP UP THE GREAT WORK, BROTHER 😎😇👍
@@sollykhan2385 Thank you! That's so kind of you!
I have same car, 160k miles. 6 shops could not fix this problem. Took to Toyota dealership for new intake manifold gasket and MAF sensor. Fixed problem. That was last year. Code is back, spent $600 on spark plugs, valve cover gaskets, gas cleaner, throttle seal. Code came back next day. Now this mechanic has my car for two days now, says he has to call a Toyota technician 😡
SerpentStar That's frustrating I'm sorry to hear about what you're going through with your car!
Brother hope you don’t get tired of me, but these are some excellent videos I learn so much. question. I have a Autel Maxi com808 basic
I ran a diagnostic on a mini Cooper 2016 and I don’t see any short term or long term fuel trim on it
@Soldier4Christ96 you can find them on the Generic side of the scan tool!
Thank you so much for this detailed video. I have a toyota prius 2007 that recently triggered this code (System too lean bank 1), but I'm unsure if it's related to a vacuum leak. I mainly saw mention in my code reader - Air Induction system, injector blockage, and mass air flow meter. I'm getting a STFT B1(%) of -2.3, LTFT B1(%) 33.6 at engine rpm of 3922 with Vehicle speed of 75. The numbers should be much lower at that speed right? What's odd is that I didn't exactly see a serious drop in fuel economy, it actually got better after I changed out my brakes, 35 -> 39 mph. I was thinking of trying to first add fuel injector oil into my gas tank to see if that would be a easy fix. Any thoughts on this would be much appreciated. Thank you for your time.
B Ch your LTFT % is high, if that number doesn't change regardless of engine speed then you might have a fuel delivery problem!