IgottaWoody

Had this happen...per chance did you have something bounce off the bottom of the car while running down the road? Check the can behind the rear axle beam and make sure the hoses are still connected...had on get knocked off, stuck it back on and never had a problem since..

redridehhr

Took my HHr to my buddy's new shop to look at a few issues. CEL light on with a P0455 code.(large evap leak). He did a smoke test on it and found it leaking at the evap canister where the purge valve(not sure if right part name) connects(behind rear axle). Pulled apart and found that the o ring(s) were missing. He didn't have any o rings that were thick enough but two worked. No CEL. WOO-HOO Just something else to look at before replacing parts.

donbrew

Where did they go? Was it magic? I haven't heard anything about David Blaine lately.

Mine has a rubber bushing thing, not O-ring.

redridehhr

I have no idea were it went. The light has been on for a while(ashamed). Wasn't sure what was there but the o-rings worked.

user 72098230

Hello,
After replacing my vent valve selenoid to resolve a P0445 code, I immediately got a P0455 code. New gas cap didn't resolve it. The fact it appeared immediately replaced the vent valve selenoid tells me it has something to do with either vent valve selenoind of the purge valve selenioind (because the guy at Advanced sold me that part for the P0445 code, which wasn't what I needed). I read here about some o-rings. Can anyone post a link that shows these orings?
Thanks!

donbrew

Did you replace the part near the gas tank? That's the one this thread is about.

The other one with a similar name is under the hood.

user 72098230

Yes. And I have good news hopefully. I took that part back off and put double o-rings on both ends with a little lithium grease. Started the car, drove it off the ramps then checked the codes. NOTHING!! I'm keeping my fingers crossed that that fixed it.

donbrew

IF you cleared the codes with a scanner or by disconnecting the battery it will take 17 COLD starts for the EVAP monitor to run.

user 72098230

I did use a scanner. All I can do is wait and see. I'll post here in a week if any come back or not.

user 72098230

Well, it's been like two weeks and the P0455 code keeps coming back. O-rings or no O-rings. It doesn't make any sense to me. I didn't have this code before having to replaced the selenoid. It only seems logical that the code has to be related somehow.