2005 Chevrolet Cobalt cobalt

2005 CHEVROLET COBALT
11,100 MILES • 2.2L • 4 CYL • FWD • AUTOMATIC
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AMBERJACKSON
  • MEMBER
  • 1 POST
When I got down the road my check gas cap keep coming on it and then the check engine light come on after I both a new gas cap for it but that didn't help the lights still come on the car can u help me
Mar 13, 2014 at 4:12 PM
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CARADIODOC
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 34,308 POSTS
The actual problem is a large leak in the fuel vapor recovery system. Since the most common cause is a loose gas cap, they use that as the warning light. In fact, there's a number of other things that can cause the same leakage. That can be as simple as loose or rusted hose clamps or as hard-to-find as a leaking valve. If the cause can't be found with a visual inspection, your mechanic can use a smoke machine to inject a white, non-toxic smoke, then he watches for where it sneaks out.
Mar 19, 2014 at 3:03 PM
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