Chevrolet Impala Problem Report

Chevrolet Impala Check Engine Light Due to Gas Cap Issue

(12 reports)

Illumination of the Check Engine Light can be caused by a loose or worn gas cap.

have replaced the gas cap 3 x at different intervals so far. -
check engine light came on. got a new gas cap..but check engine light came back on. car idles high when i hit 30mph and i have to keep stepping on the gas until it jolts and picks up -
The gasket around inside cap had become hard and develop cracks allowing pressurize air to leak out causing the check engine light to turn on. the code P0442 was reported "small leak detected" -
The gas cap was loose and wouldn't tighten, causing it to fail inspection. -
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