P0177

DTC P0177, sometimes indicated as P017700 is an OBD diagnostic trouble code indicating a generic fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the air/fuel mixture causing fuel composition sensor circuit range/performance.

The fuel composition sensor measures the air-fuel ratio in the engine. If the sensor reports a reading that is too high or too low, the DTC P0177 code will be set.
If the sensor is reporting a high or low reading, it may be dirty or defective. The sensor can be cleaned or replaced as needed.

• P0177: Fuel Composition Sensor Circuit Range/Performance
• P0177: Fuel Compensation Sensor CKT Range/Performance
• P0177: Fuel composition sensor – range/performance problem
• P0177 00: Damage to the mixture composition sensor circuit
• P0177 00: Fuel composition sensor - range/performance problem