How to Test and Replace EVAP Pressure Sensor P0450
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- เผยแพร่เมื่อ 23 พ.ย. 2014
- In this video we explore how to test and replace the EVAP pressure sensor P0450. Trouble code p0450 deals with an improper voltage signal from the EVAP pressure sensor to the ECM. This could be due to a bad harness connector, the pressure sensor or the EVAP canister vent control valve. Check with your vehicle's repair manual for testing parameters. This specific vehicle is a 1997 Nissan Maxima.
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This sensor is used with a number of components in throughout the EVAP system. The EVAP control system pressure sensor is located in the purge line. The sensor detects pressure inside the purge line and modifies the voltage signal sent from the ECM. As the pressure increases the voltage rises. This sensor is used for on board diagnostics.
P0450 - An improper voltage signal from EVAP control system pressure sensor is entered into the ECM.
P0451 - Evaporative Emission Control System Pressure Sensor
P0452 - Evaporative Emission Control System Pressure Sensor Low Input
P0453 - Evaporative Emission Control System Pressure Sensor High Input
Note:
Any attempt to repair automotive parts and/or systems carries risk of personal injury. Always adhere and follow safe practices when working on vehicles. Such as, safety glasses, jack stands, no loose clothing, etc. No guarantee or warranty is implied. Use the information in this video at your own risk. Carsntoys is a member of the Amazon Influencer Program.
Publication, reproduction or distribution of this film is strictly prohibited.
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![Pressure Sensor or Potentiometer Signal Fixed at 0v [Circuit Integrity Testing]](/img/n.gif)
Learned more in 8 minutes than all other videos I've watched combined
GREAT JOB !
Very informative easy to follow video having issues with a ford escape and mechanics don't seem to wants to be bothered to be thorough so have to figure it out myself
You are the maximum with this technique that you have, thanks for those videos they are very helpful, so God bless you
Happy to help.
You are best at the explain. Thank you
Great video man! Im receiving power to the harness but not continuity. I also had a transmission swap right before my code popped up so do you think some sort of break between the harness and the cars automatic transmission unit? If so whats the fix? Thank u !
Great Video!
Very good, your data and analysis techniques is sound and correct for diagnosis!!! Follow your steps, can't go wrong!!!! Thanks so much for your expertise!!!!! Great video!!!!
Thank you! Appreciate the feedback.
I love you man! Thanks for this video! You saved me $146 bucks. Im a subscriber for sure.
Good stuff man! Glad to help.
Hi, have you ever done evap work for a smart car? All the 451 models get the p0451 and p0452 engine codes. Most of the time the cap change doesn’t help. Do you happen to have any advice for us smart fortwo owners.
Very helpful thank u
Do all of these units (for a ford f150) send the same signal for the same pressure to the computer? I have a 2004 ford f150 with a inline pressure transducer and Ford has them on back order. I found one for a Crown Vic from a later year that looks the same but for the connector. If it would work, how would I know which wire would go to which wire on the connector? Thanks for any help.
Thanks for the video. When I check the pressure sensor does the ignition key have to turn the car to the on position but not start the car? Whats interesting is theres only two wires going to the sensor and your getting 3 volts not 5 when you test the pressure sensor.
YOUR VIDEO WAS GREAT ON EVAP SENOR IT HELP ME OUT THANKS BILL
Happy to help, Bill.
Please include Year model and make of vehicle covered by your videos. I need help with R&R of pressure sensor on 2001 Tahoe 5.3L.
Thanks for all your great work and the videos that you post.
What is the likely cause of an intermittent P0450? Engine light is off most of the time but never long enough for monitors to complete and get it passed.
Thanks for the upload man! I just passed my smog test and certification with a PO450 code on my ZR2 Blazer.. Just letting people know because alot of disinfo on this code esp. in California. Some say you wont pass some say you might some say you can. I passed whew. My OBD II reading was evap P0450 no CEL ever illuminated. Changed my gas cap before I went into the shop. I did nothing but change the gas cap and my OBDII EVAP red light was still on and I did not fail the test.
Wow. Very surprised you passed, especially in CA. Was the code pending?
Good videos, very valuable information. I've had a P1440 (small EVAP leak) for a few months and have not found the problem yet. Changed the gas cap. Even smoke tested the system with no luck. However, during one of my inspections I discovered charcoal granules in the vacuum cut by-pass tubing close to the canister. Per Nissan Service bulletin NTB00-085a, I am planning to clean out all of the tubing once my new canister shows up. My guess is that some granules are preventing valves from fully closing or blocking the pressure sensor path which end up tripping the CEL. Fingers crossed.
just came across your video. i'm testing the pressure sensor for a 2001 tacoma 3.4 liter engine. since the requirement for vacuum is so low and i don't have a vacuum pump, i decided just to suck on it (yeah, yeah...all jokes aside, i'm just making do with the tools i have) anyway, my voltage doesn't change one bit. do i need more vacuum than my mouth is making?
A 2016 honda fit - testing positive @ 2.4v, testing center w/vacuum - stays same - no drop in voltage. Is pressure sensor bad?
I have a P24d8 code on 2014 CLA 250 - evap pressure sensor high - cant seem to located where it is on my vehicle - would be helpfull if you know where ?
nice
Was this Nissan supposed to have 3.3V signal at atmospheric pressure? Or was this a bad sensor? I thought Nissan FTP signal is approximately 1.8 Vdc at zero pressure (atmosphere) . Thank you
What did you do with the negative during these test?
I have a 2001 Camry and have a PO450 and PO446 code when I did your pressure sensor test I got.
With a brand NEW canister and sensor. No pressure 3.9v and -2pka 4.9v and
my old canister and pressure sensors it reads 3.3v no pressure , 4.75v -2 kpa
If i blow pressure into the the vacuum line the voltage drops. The opposite of your video. Do you think this is why I am still getting the codes? Thank you for taking the time to do these videos. They are awesome!!!
Very good test
Indeed. Thank you.
I have a 2013 altima with a po452 code. Can you help with that please
i have a toyota corolla 2017 , recently a code P2420 show up , Toyota dealer changed the canister , what can be the problem? Evap Purge Valve?
Hi I tested the EVAP, while it was connected and Voltage did not move. it gave me 5 volts all the time, you think it's a bad EVAP?
95 Mercedes c280 engine light, obd2 reads purge flow sensor circuit low volts. I checked and the volts are .5 how a can fix the problem
I have same error code, I tested the connection have no voltage at all. Tried different method but still not able to get any reading. Checked the wires all good. Is any way I can traced it back to pcm? It’s 97 d21 Nissan pick up. Thanks
thanks for the educational / informative video . Well done but the continuity test is not a reliable one.
nice series i have p0440 on an s10 can't seem to nail it down.
I've had "EVAP system monitor incomplete" for at least 10 drive cycles. There have been no trouble codes, so apparently there are no vacuum leaks. If the tank pressure sensor was bad, wouldn't there be a trouble code? I've had the tank out a couple times already and really dread having to take it out again. If the sensor wire was open between the tank and the computer, wouldn't there also be a trouble code? Wait, it that was open then the sensor wire at the tank would read 5 volts, wouldn't it? I'm really stumped on this one, hoping you can help!
does anyone know where the evaporative emission control system pressure sensor p0450 is located in a 97 camry??? any help would be much obliged
Gas tank top
I HAVE A NISSAN 200SX98 BUT I DONT KNOW WERE IS LOCATED THIS SENSOR MI CAR HAVE DE P0446 PROBLABLI IS THIS SENSOR COULD YOU HELP ME PLEASE
Thanks! Great explanation! My 2000 Elantra has this switch on the cross frame. Very rusted and has 3 hoses coming out of it. Could a bad pressure sensor cause a P0442? I've been chasing after this small leak for months now. Replaced purge to canister line. Vent valve. Purge valve. Canister vacuum is good. Multiple gas caps. Any thoughts would be helpful. Thanks.
Scotty Kilmer has an older vehicle finding small evap leaks. He simply uses a cigar. Just do a search on his channel.
@@CarsNToys haha. Scotty's a trip. I'll give it a look. Thanks
Can someone help with locating EVAP sensor on a 2010 Mercedes E350 !!!
great videos any help is appreciated my car a 06 galant has 3 codes p0441 p0450 p0452 i check both purge valve solenoid and the evap pressure system isn't leaking at all any help appreciated
+Gilberto Calderon How about the rubber hosing; any leaks?
+CarsNToys no leaks
cant find 96 civic 0450 info
I had an eve app code show up on my Honda element PO 2422 dealer told me to replace the vent valve and the code is still there after it was a raced then they told me to replace the vent filter and that did not work either any idea what might be going on, can you help
Evap codes can be tricky. I'd first test if there's a leak. Scotty Kilmer has an older video showing how to find leaks in an evap system using cigar smoke. Just do a quick search on his page.
Q. Help, where to get a EVAP pressure sensor P0450, 1997 Pontiac Trans AM, 5.7 V8?
at any auto part supply dah I mean Al
Have 5v at connecter but when checking for continuity there is no sound on terminal 1...just numbers on the multimeter (have the exact same multimeter)
Would this indicate a break somewhere in the black wire? Could I create a bridge from another ground wire to the black wire?
What kind of vehicle are you working on?
2001 Nissan Altima, 2.4L
Abyone know how to unseat the sensor i cant figure out how to get the sensot out the clip of this nissan sebtra 2013
the website isn't at that domain anymore. is there another site you have that's up?
No. What are you looking for?
Joseph Greer: Check the hosing and make sure you don't have a leak.
Yeah that hose is split
How about makining a video for a Ford Explore 2003 4.6 EVAP sensor would love to kmow how to find it and replace it.
Sure. The next time we have one here we'll take a video.
google it Jorge
Oh hi I'm having trouble code p1447, my canister was bad so I did replace it and several other parts but after resetting my light codes it come back again, so I would appreciate any help in solving this ,thanks
How are the rubber lines running to the canister?
@@CarsNToys they look fine but maybe I need to purge them with some pressure air
Can a evap pressure sensor fault contribute to bad gas mileage?
renny khan Not likely. It's really just used for diagnostics.
Some cars, like my kia sedona, have the canister near the tank at the center of the vehicle and jacking up/lifting the vehicle for access is necessary. Ask me how I know... 😆
So why the code was on if everything was working?
Notice that Chrysler products have a fuel tank vapor pressure sensor always located in the fuel filler neck. Guess it is easier to reach
than dropping the gas tank!
Looks like the carsntoys.net website is gone. Am I wrong?
I have a 1996 240sx, for the past 6 years it has been throwing the code p0446 (the vent valve). I have replaced every hose and the carbon canister and the vent valve itself. I tested the continuity of the wiring etc. Basically I did everything and no matter what, it keeps throwing that code. it's frustrating because I can't pass inspection with this code. I brought it to multiple mechanics and they each told me something different. I ended up buying a new ECU and re-wiring the whole thing and it still won't go away. Recently I was looking at the FSM for the 100000th time and noticed it mentioned the pressure control sensor might be responsible for causing this code to pop up under p0446. Any thoughts on this? I'm so frustrated that I just want to buy a new control pressure sensor as a hail Mary attempt but they're like $120. idk what to do man, I'm losing my mind haha
Just fyi, I'm going to attempt to test the sensor just as you showed in the video just to make sure it works or not before buying one.
I'd check the vent valve, pressure sensor and double check there aren't any plugged hoses. These evap codes can be a little trickey to resolve sometimes.
Just unplug the things from the PCM reset codes on PCM and leave them not hooked up then you can pass Inspection!
When I apply vacuum my voltage goes up
Not down ????
That's likely just due to the design of the sensor. If it's changing consistently as vacuum is applied/removed, then it should be working fine.
P0451 code how to fix
The tests for 5v and ground are not valid with the connector unplugged, your circuit is not loaded. No current flow = no voltage drop.
You could have high resistance In the circuit and still read 5v at your meter.
When doing these kinds of tests your circuit has to be loaded.
Somewhat true, but still a valid test that most mechanics would perform. The voltage drop would be from the small current applied by your DMM. Yes it could be a weak connection and still give good results, but this is rare for lower power consumption circuits like a sensor.
the test meter completes the circuit you doe doe DAH DAH ROFL HAR HAR
EVAP system exist in diesel engine or not
salem ogla I wonder that too. I don't think so because I don't think diesel vaporizes like gas. Then again I've never done any work on a modern diesel pick-up
not
What will happen if the pressure sensor or its wires are bad?
Help. I have a 2000 Nissan Xterra throwing a p1446 code. I have checked the evap canister solenoid and it does close when power is applied to it.
nothing IT WONT WORK rofl
P0454
Can I just get you to replace mine smh 😒 🤦
replasement transmision oil 1998 ford ranger xlt
+ernesto bautista What about it....need a guide on how to replace the fluid?