B3131 Diagnostic Trouble Code

B3131 is a kind of OBD-II Diagnostic B-Body 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 B3131 diagnostic trouble code may include:

If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Corroded or damaged connector
Reduction in engine performance, especially at low RPM levels
Diminished fuel efficiency

Possible Causes :

Faulty IMRC actuator/sensor
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
Fuel with a large percentage of sulfur will clog the DPF quickly

Repair Processes :

It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code B3131 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 B3131.

Fortunately, B3131 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B3131 Trouble Code For Specific Cars

B3131 Peugeot 304 EGI Mini - MAF Failed Short Circuit
B3131 Daewoo Arcadia Fuel Trim Malfunction (Bank 1)
B3131 Daihatsu U4 GPS Antenna Open Circuit
B3131 Dkw Standard Ignition Coil - Cylinder 5 - Early Activation Fault
B3131 Volkswagen Golf 4 Ride Control RF Shock Actuator Circuit Failure
B3131 Daimler Db Headlamp Aim Output Relay Circuit Short To Battery
B3131 Nissan Cherry Climate Control Water Temperature Sensor Circuit Short To Ground