If the gas cap seal becomes damaged or worn it may cause fuel vapors from the gas tank to leak from the filler neck.
How to fix check engine light from gas cap.
Turn off the engine vehicle.
Pay attention to the dashboard after the check engine light experience.
I put together a video discussing a problem my neighbor had with nissan maxima four door sedan after they filled the fuel tank.
Open the gas cap door.
The check engine light should go off after you drive for several minutes if the light was caused by a loose gas cap.
The door is usually locked you ll find a push button to unlock it.
This may result in a gasoline odor from the vehicle as a result of the escaping vapors.
Once you ve noticed the check engine flashing don t worry.
If you find that the light keeps coming on and goes off again once you tighten the gas cap then your gas cap is too loose.
If it s for gas cap failure the fixing will take a mere few minutes.
If your gas cap is not properly attached you may see a check engine light or a loose cap warning light on the dash.
An illuminated check engine light is another symptom of a potential issue with the vehicle s gas cap.
The gas cap code and diy check engine light car repair the gas cap code is a common diagnostic trouble code that might turn your check engine light on.