Buick Riviera Problem Report

Buick Riviera Check Engine Light Due to Gas Cap Issue

(3 reports)

A Loose or worn gas cap may cause Check Engine Light to illuminate.

check engine light came on, loss of power from motor, i thought it was the supercharger going out. Ended up being a bad gas cap. -
I was told the charcoal canistor is pluged or needs to be cleaned or replaced. -
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