C0131 Diagnostic Trouble Code

C0131 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 C0131 diagnostic trouble code may include:

Faulty O2 Sensor
Lack of power
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Engine surge

Possible Causes :

Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Fuel with a large percentage of sulfur will clog the DPF quickly

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 the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio.

Process Tips

Diagnostic trouble code C0131 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 C0131.

Fortunately, C0131 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0131 Trouble Code For Specific Cars

C0131 Toyota Starlet Passenger Door Ajar Circuit Short To Ground
C0131 Ascari Kz1 Air Suspension RF Air Spring Solenoid Output Circuit Open
C0131 Mazda Sw-x A/C Demand Out of Self Test Range
C0131 Daihatsu Opti Glow Plug Circuit High Side Low Input
C0131 Tvr 420 Power Door Lock Circuit Short To Battery
C0131 Ferrari Testarossa Keyless Entry Circuit Short To Battery
C0131 Toyota Solara Parking Brake Switch Circuit Failure