Problem Description and Possible Solution
A Loose or worn gas cap may cause Check Engine Light to illuminate.
Average mileage: 90,776 (44,550–208,700)
19 people reported this problem
Diagnostic code comes up to say emissions leak and was told preferably to change gas cap, but when I did replace the cap, I unhooked the battery thinking it would reset and if the problem had been resolved then the check engine light would not come back on. Not the case, however, because the light came back on and I am again looking for a resolution.
Check Gas Cap came on the DIC once. Checked, it was tight. Message did not reappear. About 2 weeks later, the check engine light came on. I said it was the fuel/evap system. Replaced the gas cap, but it did not fix the issue. Now looking for other problems. Found the undercoating above the left catalytic converter, below the master cylinder looked wet and is sticky. The fuel lines run through this area. Suspecting leaking steel line, but could not find it with engine running. There is no smell, so I suspicion the fuel is evaporating and just softening the tar.