2006 Saturn Relay Logo
Posted on Nov 12, 2009
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2006 Saturn Relay Check Engine Light

2006 Saturn Relay, 59000+ milage, got "check engine" light. Took it to Valvoline quick service and got fuel system cleaning and oil change. Check engine light started flashing then went steady again. Mechs reset computer by disconnecting battery. that day after leaving got a "check gas cap" message. stopped car and removed and replaced gas cap. Got message again. Removed and replaced again. Next morning got check gas cap again and check engine like came back on. Changed gas cap to factory cap (had a locking cap on that I had recently put on). Gas cap message went away, check engine light did not. Took it back to valvoline and they couldn't read diagnostic error. Took to autozone who read error as "P0455". Please let me know what I should do next? Do I wait to see if changing the gas cap worked? If so, how long? If that wasn't it, what should I be asking a mechanic to look for?

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  • synsyter_0 Jun 04, 2010

    So you replaced the gas cap.? Do you still have the issue?
    I've got the same problem. I replaced the gas cap and it didn't fix the issue.
    Through some investigation I found out that there might be an issue with the charcoal canister.
    But I haven't been able to find it on the vehicle.
    Let me know if you've resolved this because I'm still looking for a resolution to the problem.

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  • Posted on Nov 12, 2009
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PO455 is a large evaporative fuel leak. A bad fuel cap is ONE of the things that COULD be the problem. Fuel system cleaning only lightened your wallet. Reading your post is confusing. Did all this start AFTER the Valvoline Wallet Flushing? If so , they left something loose or disconnected. I would find a qualified repair shop to fix the problem, and if it has anything to do with what Valvoline did, make them pay the bill.

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