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Terraza
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Check Engine Light Due to Gas Cap Issue on Buick Terraza

Problem Description and Possible Solution

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

Problem Data
RepairPal Verified
Average mileage: 101,393 (75,000–157,000)
3 model years affected: 2005, 2006, 2007
26 people reported this problem
Comments
Viewing 1 - 8 of 8 comments
The check engine light stays on and periodically the indicator warning flashes saying check gas cap. I have replaced the gas cap, but nothing changed.
gas cap light comes on and the next day chech engine light comes on; ask dealer about this and he stated there could 5 0r 6 things that cause this--to check this $90.00 not counting repairs.
Same issue, engine light is on. It states to "check gas cap." I replaced the gas cap twice and had the dealer to reset the light. Came back on the next day.
check gas cap is on .changed it with a new one check engine light came on .then gose out again .has a new gas cap on still light is on
Check gas cap warning starting coming on last week. On Sunday the check engine light came on and stayed on. I have tightened, unscrewed and screwed the gas cap. Electrical? Also, has anyone else had problems with the radio? I can turn it on, but there is no sound. If I turn the car off and restart, the radio works again. The display shows the radio/CD player on, but no sound.