f150 check engine light
beatruit
09-29-2005, 09:57 AM
the check engine light will come on after refueling, and goes out when gas is below 1/4 tank. The manual says it could be bad gas, the top is to securely on, or low fuel, but why does this keep happening over and over.
Hollowcreek
10-14-2005, 02:21 PM
Has the gas cap been pressure tested lately? I'll bet its bad.
kahjdh
10-22-2005, 10:04 PM
check engine is mostly emissions. If you have a bad gas cap then it will trip the light.
beatruit
10-26-2005, 02:23 PM
thanx guys
95GT
12-07-2005, 10:05 PM
What year is your truck. If it is OBD I, the EVAP system will not set a code or light because of a leak in the system. The gas cap is part of the EVAP system so if your truck is earlier than 95, the cap will not be your light problem.
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