engine light - Chevy Traverse Forum: Chevrolet Traverse Forum
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post #1 of 6 (permalink) Old 08-30-2019, 09:18 PM Thread Starter
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engine light

So I have a 2018 Traverse LT FW with 36700 miles on it. Last week my check engine light came one. So I have a OBD reader on my sprint drive, and it alerted me that my P code was P0469 bad purge valve. So I change the purge valve, then this morning the check light came back on. Now its P0455 EVAP system leak detected (large leak). So there is no gas cap, so that went out the window. The only other choice I could think of is a bad vent valve. Any one have any suggestions, or have a clue where the **** the vent valve is located. I crawled under the vehicle and couldn't locate it, unless its on top of the gas tank.
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post #2 of 6 (permalink) Old 08-30-2019, 09:52 PM
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Do you top off the gas when you fill up?

2018 High Country,2015 Chevy SS,1996 Pontiac Firebird Formula
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post #3 of 6 (permalink) Old 08-30-2019, 10:45 PM
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Quote:
Originally Posted by steven0614 View Post
Do you top off the gas when you fill up?
X2. Overfilling the gas tank is a known purge valve killer on gen 1.
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2011 2LT FWD replaced by 2017 2LT AWD
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post #4 of 6 (permalink) Old 08-31-2019, 11:14 AM Thread Starter
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I do, but when the light came back on I was just below a half tank.
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post #5 of 6 (permalink) Old 08-31-2019, 01:27 PM
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I don't believe the valve dies "immediately."

2011 2LT FWD replaced by 2017 2LT AWD
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post #6 of 6 (permalink) Old 09-05-2019, 01:08 PM
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Quote:
Originally Posted by Bernabemontejano View Post
I do, but when the light came back on I was just below a half tank.
should never overfill gas tank this will damage the evap system overtime alway stop when the pump stops automatically.
you probably damaged the evap system.

2018 High Country,2015 Chevy SS,1996 Pontiac Firebird Formula
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