Problem Reports
Pontiac Grand Prix
Report: Check Engine Light Due to Gas Cap Issue
Pontiac Grand Prix Problem
Model Years Affected: 2004, 2005, 2006, 2007, 2008
Average Mileage: 96,299 mi (28,000 mi - 185,148 mi)
Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
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Report #1Visitor, 2006 Pontiac Grand Prix, 100,000 mi
Had check engine light on for long time. Kept clearing it at dealer. Eventually went away. Not sure why-never fixed anything.
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Report #2jerryh20, 2004 Pontiac Grand Prix, 90,000 mi
Rookiecar indicated gas cap failure on service screen - replaced cap and warning cleared itself.
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Report #3Visitor, 2007 Pontiac Grand Prix, 75,000 mi
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Report #4Visitor, 2008 Pontiac Grand Prix
My check engine light came on. Problem diagnosed was loose fitting gas gap. Bought new cap and light went off.
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Report #5Visitor, 2007 Pontiac Grand Prix, 89,000 mi
My check engine light has been on for a while. My dash says to check gas cap, it's always tight. I have bought two new caps since and light is still on. I even went as far as getting a locking one and no change. No one has a solution.
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Report #6ebonywomansc, 2007 Pontiac Grand Prix, 97,000 mi
RookieI've had this happened to me as well after replacing cap for the third time I found out I had a small leak in the evap. fuel emission canister which I have to have replaced
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Report #7Visitor, 2006 Pontiac Grand Prix
Check engine light came on. Problem was corrected by installation of a new gas cap and gas line filter.
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Report #8Visitor, 2008 Pontiac Grand Prix
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Report #9Visitor, 2004 Pontiac Grand Prix
check engine light is on. I get a message to check gas cap. I replaced the gas cap but am still getting the same message.
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Report #10Visitor, 2005 Pontiac Grand Prix
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Report #11Visitor, 2004 Pontiac Grand Prix, 80,000 mi
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Report #12Visitor, 2008 Pontiac Grand Prix, 28,000 mi
Removed and re-installed gas cap.
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Report #13Street Sports Bossman, 2006 Pontiac Grand Prix, 185,148 mi
EnthusiastNew gas cap did not fix the problem. Throwing code P0455 - EVAP system leak (large) - customer had to take car on trip and will drop it back off when they return.
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Report #14Visitor, 2007 Pontiac Grand Prix, 83,147 mi
Check gas cap, not fixed
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Report #15Visitor, 2008 Pontiac Grand Prix, 102,000 mi
i had 2 codes one catilac converter had that repaired po455 code had that checked smoke test found no leak went to gm dealer got new gas cap how long does it take before check engine light goes off
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Report #16iaminkstercity, 2004 Pontiac Grand Prix, 130,000 mi
Enthusiastreplaced the gas cap and the light went off for about a week then came back on, now it goes off about once a week then is back on later that day
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