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CEL came on the other day..A couple of stops after re-fueling,it was cold... went out 2 days later when the weather got mild...(?) It ran fine... anybody got any ideas?

2011,4cyl... 2000 kms
 

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rick7343 said:
anybody got any ideas?
Possibly the gas cap didn't seal well because of the cold, and once it warmed up, the rubber gasket softened up, and made a better seal. Just a SWAG. The code should be stored for awhile, You can usually pull the code from most auto parts stores for free, or take it to the dealer. Depends on whether you want to spend 5 minutes, or 5 hours !
 

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RIT333 is right, the most common cause of the check engine light in modern cars is the gas cap being off, misaligned or not tightened down enough. Maybe car makers should have a separate warning light for the gas cap instead of making everyone think their engine is about to explode? :D
 

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NoobNox said:
Maybe car makers should have a separate warning light for the gas cap instead of making everyone think their engine is about to explode? :D
Great idea, BUT I'll bet mechanics can make a lot of extra cash "fixing" faulty gas caps ! They would certainly lobby against your idea. ;D ;D
 

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If you still have onstar you can get them to check the codes.
 

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Hhmm don't know on these, but my other GM vehicles set the SES light (NOT CEL) for the fuel cap thing. I seem to remember also my 06 they may have changed to say check gas cap (not sure on that though)
 

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My cel light just came on the other day too, onstar said it was something with the fuel pump (same error code I had when I was driving too and from florida). I filled up the day before right as I was going home so I reseated my gas cap and it went away. One thing I hate about when you have a cel on is the remote start dont work :( 50k+ and still no major issues.
 

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I googled around a bit and there has been some issues with CEL light being on (for both 4 and 6 CYL). P0172 or P0175 codes. In the 6 it may include excessive fuel contamination in the oil. I would get it checked.
 
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