Question about 2006 Chevrolet Aveo

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2006 Chevrolet Aveo Check engine light comes on when under 3/4 tank fill it back up and the check engine light shuts off. What could be the problem?

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It is related to the loss of air pressure above th fuel in the tank of ur aveo.

Posted on Feb 04, 2011

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I would first suspect that the gas cap is losing its seal, which happens to take about 1/4 tank of driving perhaps. The fuel tank, like most cars today, works on a closed system with a return and the air above the fuel needs to remain slightly pressurized.

The gas cap was a common problem on the 04 Aveo's; in fact the dealers were fixing them for free then. Tightenning the cap wont imediately turn of the light however because the computer needs to see the engine go through several drive cycle conditions before clearing.

Inpect the cap, the seal and the fuel neck. Perhaps cleaning the cap and seal area if necessary. Look for cracks in the fuel neck. If all looks good and this doesnt work try a new cap either aftermarket or from the dealer.

Posted on Jan 02, 2011

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Check engine light comes on sometimes after a fill up of the gas tank.Run out the gas and it sometimes goes out.Refuel and it's anybodys guess if the CE light comes on.What's my problem?Hoppy lpat @ctc.net...


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