C1176 Diagnostic Trouble Code

C1176 is a kind of OBD-II Diagnostic C-Chassis Diagnostic Trouble Code.

It is considered generic because it applies to all makes and models of vehicles, although specific repair steps may be different depending on your car model.

Symptoms

Symptoms of a C1176 diagnostic trouble code may include:

The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Faulty PCM
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Diminished fuel efficiency

Possible Causes :

The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture.
Defective ECU strategies or components will prevent proper regeneration
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. If you find a related TSB, the information will often help in diagnosing the code in question as TSBs are crested from many thousands of repairs.

Process Tips

Diagnostic trouble code C1176 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before C1176.

Fortunately, C1176 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C1176 Trouble Code For Specific Cars

C1176 Austin Mini Aux A/C Blower Speed 1 Circuit Failure
C1176 Mazda Ms-9 (CAN) Lack of Acknowledgement From Engine Management
C1176 Mitsubishi Dion Autolamp Delay Circuit Failure
C1176 Mitsubishi Galant Viii Autolamp Delay Increase Circuit Short To Battery
C1176 Hindustan Motors Contessa Pedal Correlation PDS1 and HPDS
C1176 Citroen C4 Ii Fuel Composition Sensor Circuit High Input
C1176 Honda Legend Purge Flow Sensor Circuit Low Input