C0031 Diagnostic Trouble Code

C0031 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 C0031 diagnostic trouble code may include:

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

Possible Causes :

Fuel with a large percentage of sulfur will clog the DPF quickly
The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data.

Process Tips

Diagnostic trouble code C0031 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 C0031.

Fortunately, C0031 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0031 Trouble Code For Specific Cars

C0031 Mg Rv9 Alarm Panic Input Circuit Failure
C0031 Opel Vectra Door Handle Switch Circuit Open
C0031 Lancia Medusa Split Air #1 Circuit Malfunction
C0031 Jaguar 420 Seat Driver Backward Circuit Short To Ground
C0031 Adler 55 ABS Outlet Valve Coil LF Circuit Open
C0031 Riley Kestrel Horn Switch Circuit Failure
C0031 Ford Tonka Mirror Switch Assembly Circuit Short to Battery