Trouble code P0179 indicates a problem with your car's fuel composition
sensor. The fuel composition sensor checks for contaminated fuel. Trouble
code P0179 can be triggered by in fact contaminated fuel, a bad fuel
composition sensor, damaged sensor harness or bad connection, and in the
worst case scenario, a defective engine control computer (ECC).
We recommend first replacing your car's fuel filter and then refilling with
fresh fuel. Drive your vehicle for at least one week. If the check engine
light does not turn off you will need to have a smog check repair station
conduct a diagnosis of your car's trouble light code P0179 failure using
diagnostic tools.
