P0179 - Fuel Composition Sensor Circuit High
Some vehicles may run on a mixture of different fuels and the ECM will use a sensor to check that the mixture of the fuels is at the correct ratio
Fault Code Explained
The ECM has detected that the sensor output is either above its maximum operating parameter or is higher than expected for the current operating conditions.
It is recommended to follow the manufacturers recommended test plan when diagnosing this fault code