Buick Century Problem Report

Buick Century Check Engine Light Due to Gas Cap Issue

(3 reports)

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

2003 Buick Century code P0442. Evap system (small leak). Bought replacement fuel cap from GM (I read that it must be from GM). No "service engine light" after 50 miles. -
Replaced worn gas cap. -
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