Check Engine Light Due to Gas Cap Issue on Pontiac Grand Prix GTP

Problem Description and Possible Solution

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

Problem Data
RepairPal Verified
Average mileage: 130,000 (130,000–130,000)
2 model years affected: 2004, 2005
4 people reported this problem
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Viewing 1 - 2 of 2 comments
my check gas cap illuminated replaced my gas cap and reset monitoring system and no problems since