Question about 2007 Chevrolet Cobalt Coupe

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Check engine. Light

Po171

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The check engine light is commonly activated by a loose gas cap, regardless of vehicle make or model. Having said that, it could also be a more significant issue. You may want to err on the side of caution and schedule a maintenance.

If it's come on recently (especially if you noticed it shortly after refueling) and you don't notice any difference in the way the vehicle has been starting, handling, or otherwise operating, you can try to unscrew the gas cap, screw it back on based on the vehicle user manual or instructions printed directly on the cap (i.e. turn until three clicks, turn until hand tight), and drive the vehicle around for a few days. The light usually won't deactivate immediately after correcting the problem. You'll have to drive it around for a couple of days to a week in order for the check engine light to go away.

Posted on Apr 18, 2014

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