C1131 Diagnostic Trouble Code

C1131 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 C1131 diagnostic trouble code may include:

Corroded or damaged connector
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Lack of power
Rich or lean exhaust

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.
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.

Repair Processes :

Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness. Look at the plug wires to make sure they are not burnt or laying on the exhaust. 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 C1131 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 C1131.

Fortunately, C1131 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C1131 Trouble Code For Specific Cars

C1131 Skoda 430 Keyless Entry Circuit Failure
C1131 Vauxhall Meriva Pressure Control Solenoid B Control Circuit High
C1131 Lanchester Dauphin Speed Vehicle Signal Circuit Failure
C1131 Toyota Supra Passenger Door Lock Switch Circuit Shorted to Ground
C1131 Mercedes A 180 ABS Function Enabled Input Circuit Failure
C1131 Citroen C1 Front Sounder Circuit Failure
C1131 Morris Cowley Brake Pedal Input Circuit Ground Short