Buick Park Avenue Problem Report

Buick Park Avenue Check Engine Light Due to Gas Cap Issue

(14 reports)

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

Car drove fine, but Service Engine light was on. Had it checked out and was told of a small air leak and gas caps loose their seal after a while. Got a new gas cap and the light went out. -
Fuel cap will not stay on. -
it's not fixed -
440 code showing as problem and after resetting/clearing code engine light always comes back on. Replaced fuel cap. Still coming on. Smoke tested car and replaced sensor...still comes on. -
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