Question about 2004 Buick Rainier
Autozone and dealer says that loose gas cap is causing engine service light but the cap is not loose. what do I do?
The cap might need a pressure check. Just because it stays on and tight doesn't mean it is functioning properly. It must meet EPA standards to function properly. Your cap is special part of your emission system and if it is not working properly you will need to replace it and have the light reset. If you owed a code reader it would tell you the same. Auto zone does do free code reading. The check engine light usually is not a big problem,but... I will leave it at that.
Posted on Jun 01, 2009
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Posted on Jan 02, 2017
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