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post #1 of (permalink) Old 03-09-2017, 10:52 AM Thread Starter
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P0455 Code

Hello,
I have a 2013 Impala Flex fuel 3.6l. I recently had my check engine light come on with a P0496 code. I took it to a local mechanic, because my Chevrolet dealer took four hours just to do an oil change and I didn't feel like waiting on them to take forever just to make me pay them a lot of money. The mechanic told me to buy a new fuel cap and drive regularly for about a week to see if that fixed the issue. Well it didn't, so I took it back to him. He did a test on it and said it was my purge valve solenoid. I paid him $125 to fix that and the car did great for the next two weeks. When I tried remote starting the vehicle, it wouldn't start. I manually turned the vehicle on to find another code. I checked it with my OBD2 scanner and now it is showing a P0455. I am now lead to believe that it could be the canister solenoid. I was going to go about this by repairing it myself. However, the part is $70 and I don't want to replace it if I don't know that this will fix it. When I clear the code on my car (only done twice) it doesn't come back on until I try to remote start my vehicle. I'm not sure if anyone else has had this issue or not and if they have, I'd like to know how you went about fixing the issue.
-Thanks
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post #2 of (permalink) Old 03-09-2017, 12:43 PM
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Quote:
Originally Posted by Huntjoshua View Post
Hello,
I have a 2013 Impala Flex fuel 3.6l. I recently had my check engine light come on with a P0496 code. I took it to a local mechanic, because my Chevrolet dealer took four hours just to do an oil change and I didn't feel like waiting on them to take forever just to make me pay them a lot of money. The mechanic told me to buy a new fuel cap and drive regularly for about a week to see if that fixed the issue. Well it didn't, so I took it back to him. He did a test on it and said it was my purge valve solenoid. I paid him $125 to fix that and the car did great for the next two weeks. When I tried remote starting the vehicle, it wouldn't start. I manually turned the vehicle on to find another code. I checked it with my OBD2 scanner and now it is showing a P0455. I am now lead to believe that it could be the canister solenoid. I was going to go about this by repairing it myself. However, the part is $70 and I don't want to replace it if I don't know that this will fix it. When I clear the code on my car (only done twice) it doesn't come back on until I try to remote start my vehicle. I'm not sure if anyone else has had this issue or not and if they have, I'd like to know how you went about fixing the issue.
-Thanks
Unfortunately, I don't think there is any way to be 100% sure if replacing the canister solenoid will fix it or not, but it sounds like you're on the right track. There are 2 different parts related to this system - and usually, it's a gamble as to which part it is. You've already had the other part replaced (the purge valve solenoid), so there is a pretty good chance that replacing the canister solenoid will fix the issue... I would do it. This seems to be quite a common issue on the 2012+ Impalas...

But, like I said, no guarantees...

Unless someone else has a better recommendation (I'm NOT a mechanic)!

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post #3 of (permalink) Old 03-09-2017, 02:06 PM Thread Starter
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Okay, I may try doing that. Thank you for your reply.
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post #4 of (permalink) Old 03-11-2017, 07:32 AM
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jt gave you the best recommendaton I believe. P0455 is difficult to handle without a scan tool. Without it, you will have to replace a part at a time. You already replaced gas tank cap, fuel vapor purge valve, and are going to replace canister vent valve. If this doesn't work, then you will have to examine fuel vapor line and the filler hose/tube for a hole.

An alternate path is to pay your mechanic to attach a scan tool to OBD port and activate purge valve/canister vent valve, and go from there.

Last edited by paker; 03-11-2017 at 08:00 AM.
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post #5 of (permalink) Old 03-12-2017, 06:19 AM
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Might have a look at what scannerdanner did to chase this down. Seems to be a common GM problem.
This may help
It may not


Some things are better left unsaid, which I generally realize right after I have said them.
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post #6 of (permalink) Old 03-20-2017, 01:51 PM Thread Starter
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UPDATE-
I replaced the canister valve solenoid and it seems to have fixed my issue with the vehicle. Thank you to everyone who tried to help me out!
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post #7 of (permalink) Old 03-20-2017, 02:51 PM
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Thank you for sharing your repair experience.
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post #8 of (permalink) Old 03-21-2017, 01:03 AM
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You screwed yourself by cheaping out and not going to the dealer!
Now its gonna cost you !!!!!!!!!!!!!!!!!

Those parts are covered by/under the FEDERAL emission warranty!
No matter what the mileage and up to 8 years IIRC.

They replaced those gadgets in my 2013 Impala
and my 2007 Chevy truck at NO CHARGE!
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post #9 of (permalink) Old 03-21-2017, 03:20 AM
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Honestly, when mine fail, I'll probably just replace them myself as well. They are inexpensive and easy to replace. I'd rather avoid going to a dealer (the whole scheduling thing, missing work, etc). Not to mention this way, I have control over exactly what is done to my car. I've had dealerships screw up just as much stuff as they've fixed (while fixing things). :-)

I avoid dealerships at all costs...

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post #10 of (permalink) Old 03-29-2017, 04:53 AM Thread Starter
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Quote:
Originally Posted by sonjaab View Post
You screwed yourself by cheaping out and not going to the dealer!
Now its gonna cost you !!!!!!!!!!!!!!!!!

Those parts are covered by/under the FEDERAL emission warranty!
No matter what the mileage and up to 8 years IIRC.

They replaced those gadgets in my 2013 Impala
and my 2007 Chevy truck at NO CHARGE!


I didn't screw myself. Chevrolet has an Expiration Mileage on their Emission warranty, which is 80,009 miles. my vehicle is currently at 96k miles.

Last edited by Huntjoshua; 03-29-2017 at 04:55 AM. Reason: Grammatical Error
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post #11 of (permalink) Old 03-29-2017, 04:54 AM Thread Starter
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*Still having issues*

I have replaced the Purge Valve canister, the Purge Valve solenoid, and the gas cap. The P0455 code seems to come and go now with a "Tighten Gas Cap" readout. I thought I had fixed the problem when the code went away on the first engine start and stayed off for about a week. I'm not really sure what else I can do other than a smoke test to the EVAP system. If anyone has anymore suggestions, I'm open to them. Thank you all!
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No matter they will be covered on the powertrain warranty till 100k.
Object-ID=3975448 Owner=Patchak, Roxanne
LMD=09-Dec-2014 LMB=Patchak, Roxanne
The emission parts listed here are
covered under the Emission Control
System Warranty. The terms are
explained in the Emission Control
Systems Warranty on page 23
under “Federal Emission Control
System Warranty” and the
“California Emission Control System
Warranty.”

Important: Certain parts may be
covered beyond these warranties if
shown with asterisk(s) as follows:

. (*) 7 years/70,000 miles,
whichever comes first, California
Emission Control System
Warranty coverage.
. (**) 8 years/80,000 miles,
whichever comes first, Federal
Emission Control System
Warranty coverage. (Also
applies to California certified
light duty and medium duty
vehicles.)
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post #13 of (permalink) Old 03-29-2017, 08:58 PM
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Quote:
Originally Posted by Huntjoshua View Post
I have replaced the Purge Valve canister, the Purge Valve solenoid, and the gas cap. The P0455 code seems to come and go now with a "Tighten Gas Cap" readout. I thought I had fixed the problem when the code went away on the first engine start and stayed off for about a week. I'm not really sure what else I can do other than a smoke test to the EVAP system. If anyone has anymore suggestions, I'm open to them. Thank you all!
I agree. Smoke test is next step. You may want to crawl under and visually check hoses/pipes/connectors that fuel vapor touches. I used home made smoker that burns incense. My P0455 was on my other Ford. Sorry I cannot coach you on Impala.
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post #14 of (permalink) Old 03-30-2017, 06:08 AM
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Just wondering whose gas cap you bought?
Was it an aftermarket one (Dorman or the like) or genuine GM junk ?
A lot of the offshore stuff ain't all that great for quality control.
Just a thought.

Some things are better left unsaid, which I generally realize right after I have said them.
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Quote:
Originally Posted by retiredpauly View Post
Just wondering whose gas cap you bought?
Was it an aftermarket one (Dorman or the like) or genuine GM junk ?
A lot of the offshore stuff ain't all that great for quality control.
Just a thought.
I replaced the fuel cap with an ACDelco fuel cap.
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