P0179 - Fuel Composition Sensor Circuit High

System Information

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.

Recommended Tests

It is recommended to follow the manufacturers recommended test plan when diagnosing this fault code