Replacement vapor canister vent valve

[Hall]

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) ?

 

[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. 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.

 

[spasm3]

what year, make, and model?

 

[E150GT]

Junkyard?

 

[Hall]

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

 

[chemman]

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.

 

[zzyzzx]

Dorman is normally junk that should be avoided.

 

[clinebarger]

Test the vent valve on the bench with a 12v battery, Should hold with power/ground applied.

 

[slacktide_bitog]

Get the Standard/SMP or the Airtex/WVE

Many of them are reboxed OE

 

[TheLawnRanger]

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.

 

[Hall]

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).

 

[clinebarger]

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.

 

[Hall]

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)

 

[clinebarger]

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.