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Replacement vapor canister vent valve #5423595 05/07/20 07:01 PM
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hallstevenson Offline OP
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My car is throwing a P0455 code and one of the culprits is the canister vent valve. Not interested in paying $120+ for an OEM part but the alternatives look like $20-25 versions from off-brand vendors or $60-70 from SMP or Dorman. I've used a variety of SMP parts on different cars in the past with no issues. Many of them looked 100% identical to the part I removed. Not a lot of experience with Dorman for 'electrical' parts though. For the price, I'm not afraid to try the Amazon units.

What would you go with (not counting OEM) ?

Re: Replacement vapor canister vent valve [Re: hallstevenson] #5423609 05/07/20 07:29 PM
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samven Offline
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I went with a Dorman purge solenoid to fix a P0442 and so far its been working just fine. A 0455 is a gross (large leak) though, have you checked all your hose clamps and gas cap. If its a Dodge/Chrysler product they used some cheap plastic clamps in the evap system that rot and fall off and you never realize there was ever a clamp there.

Re: Replacement vapor canister vent valve [Re: hallstevenson] #5423610 05/07/20 07:29 PM
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spasm3 Offline
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what year, make, and model?


13 elantra 84k 5w30 synpwr
03 chevy avalanche 83k synpwr 5w30
17 mazda cx-5 19000 miles m1 0w30
Re: Replacement vapor canister vent valve [Re: hallstevenson] #5423615 05/07/20 07:42 PM
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E150GT Online Content
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Junkyard?


1984 Mercedes-Benz 300SD - 100k
1995 F150 XL 4.9 reg cab 5MT - 253k 5w30
2016 Mazda6 Touring 6MT - 81k 5w30
2006 Buick Lucerne CXL 3.8 50k 5w30
Re: Replacement vapor canister vent valve [Re: spasm3] #5423628 05/07/20 07:58 PM
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hallstevenson Offline OP
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Originally Posted by samven
I went with a Dorman purge solenoid to fix a P0442 and so far its been working just fine. A 0455 is a gross (large leak) though, have you checked all your hose clamps and gas cap.
I tightened the gas cap and it returned. I'm going to remove it again, look for debris, and clean up the seal. I may try and replacement gas cap first. Just looking at options.

I can't smell fuel or there's none leaking, FWIW.

Originally Posted by spasm3
what year, make, and model?

'08 G35X

Re: Replacement vapor canister vent valve [Re: hallstevenson] #5423630 05/07/20 07:59 PM
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chemman Offline
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When I had to replace the canister vent valves on our Silverado and Buick, I went with the SMP parts and have had zero problems. I personally prefer SMP/BWD over Dorman.


92 Olds 88 Hav 5w30 PL/L24011
99 Buick Century Hav 5w30 PL/L24011
99 Silverado 5.3L Hav 5w30 PL/L25288
04 TrailBlazer 4.2L Hav 5w30 PL/L25288
Re: Replacement vapor canister vent valve [Re: hallstevenson] #5423685 05/07/20 09:08 PM
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zzyzzx Online Sleepy
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Dorman is normally junk that should be avoided.

Re: Replacement vapor canister vent valve [Re: hallstevenson] #5423704 05/07/20 09:38 PM
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clinebarger Offline
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Test the vent valve on the bench with a 12v battery, Should hold with power/ground applied.


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/U341E
2000 Toyota Avalon 1MZ-FE/A541E
Re: Replacement vapor canister vent valve [Re: hallstevenson] #5423742 05/07/20 11:55 PM
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slacktide_bitog Online Content
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Get the Standard/SMP or the Airtex/WVE

Many of them are reboxed OE

Re: Replacement vapor canister vent valve [Re: hallstevenson] #5423744 05/08/20 12:02 AM
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TheLawnRanger Offline
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I used a Dorman blend door actuator on my Impala. Actually, I've used three. I went with AC Delco last time. I think it may be the design more than the manufacturer in my case.


2011 Impala
2012 Colorado
Oil: 5w30 synthetic
Filters: Wix 51522 for both
Re: Replacement vapor canister vent valve [Re: clinebarger] #5424960 05/09/20 06:27 PM
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hallstevenson Offline OP
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Originally Posted by clinebarger
Test the vent valve on the bench with a 12v battery, Should hold with power/ground applied.

I saw a video of a person doing just this. Sorry for the dumb question, but the vent valve is a 'dumb' device, correct ? It doesn't measure anything, just gets a signal from the ECU (??) to open and close ?

Two other comments related to this part and my situation....

1) After it first threw the P0455 code, I tightened the gas cap, cleared the code, but it returned after an 8-9 mile drive (on the way to work). It did this (3) times, including once after I cleaned the filler area and gas cap. All of this was with less than a 1/2 tank of fuel. After I filled up (well, not filled, but 3/4 full), I drove almost 50 miles plus a few short errands. Knock on wood, the code hasn't returned.
2) Would a faulty vent valve not allow fuel to be added sometimes ? In the 2-1/4 years that I've owned this, over ~30k miles, I can count on one hand the # of times it's happened, but while fueling up, the gas nozzle clicks off like it's full but it's nowhere near full. Waiting a minute, removing the fill nozzle, etc doesn't help or solve it. I just have to take what fuel it allowed (always plenty, such as 5-10 gallons or sometimes more).

Re: Replacement vapor canister vent valve [Re: hallstevenson] #5425075 05/09/20 09:00 PM
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clinebarger Offline
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Yep....The Vent Valve is either Open or Closed. Though the PCM does continuously monitor the circuit for abnormal voltages which all but eliminates the possibility of a wiring issue or an open coil in the Vent Valve.

It not taking fuel is the #1 symptom of a mechanically sticky Vent Valve.


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/U341E
2000 Toyota Avalon 1MZ-FE/A541E
Re: Replacement vapor canister vent valve [Re: clinebarger] #5425099 05/09/20 09:33 PM
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hallstevenson Offline OP
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Originally Posted by clinebarger
It not taking fuel is the #1 symptom of a mechanically sticky Vent Valve.

But not always throw a code ? As I said, it's never given a code until a week ago but over the course of ~2 years, it's happened less than 5 times, but it would stop me from filling up with fuel. Sounds like if the P0455 returns, I need to order and replace the vent valve. Sounds like SMP is the way to go too.

Thanks (to all that responded)

Re: Replacement vapor canister vent valve [Re: hallstevenson] #5425166 05/09/20 11:19 PM
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clinebarger Offline
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It's sticky....As in it happens sometimes. The PCM will notice it when Vacuum or Pressure doesn't decay fast enough or not at all via the Tank Pressure Sensor.


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/U341E
2000 Toyota Avalon 1MZ-FE/A541E
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