The P0179 trouble code indicates a high input signal from the fuel composition sensor circuit. This code typically points to issues related to the sensor responsible for detecting the composition of the fuel, potentially causing operational problems or inaccurate fuel mixture calculations due to a high input signal.
Fuel Composition Sensor Circuit High Input
Code symptoms P0179.
1. Decreased fuel efficiency.
2. Engine performance issues.
3. Malfunction indicator light (MIL) illumination.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0179.
1. Malfunctioning or faulty fuel composition sensor.
2. Wiring or connector issues within the sensor circuit.
3. Possible issues with the Engine Control Module (ECM).
Code Solutions P0179.
1. Replace the fuel composition sensor if it is malfunctioning or providing high input signals.
2. Check and repair any wiring or connector issues in the sensor circuit.
3. If ECM issues are suspected, consult a qualified technician for diagnosis and potential reprogramming or replacement.