viper88
Well-Known Member
A loose gas cap is the most common trigger for a check-engine light. The EVAP system is supposed to be sealed. The EVAP system thinks a loose cap is a leak. It actually is a leak, a human error. It's a good habit to tighten the gas cap until you hear 3 clicks.A somewhat sidetracked quick anecdote.
The engine light went on in my Wrangler. I brought it to the dealer who it seems properly diagnosed that I had not tightened the gas cap adequate: no less than 3 clicks.
I didn't smell fumes but the dealer's diagnostic equipment did detect them from the gasoline filling port until the cap was tightened. This leak was also detected by the rig's systems which then actuated the aforementioned engine light.
~~~~~~~~~~~~~
Sponsored