P3131 Diagnostic Trouble Code

P3131 is a kind of OBD-II Diagnostic P-Powertrain 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 P3131 diagnostic trouble code may include:

Fuel pressure too low
Rich or lean exhaust
Diminished fuel efficiency
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Faulty IMRC actuator relay (if equipped)
Faulty IMRC actuator/sensor

Repair Processes :

Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble. Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector.

Process Tips

Diagnostic trouble code P3131 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 P3131.

Fortunately, P3131 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P3131 Trouble Code For Specific Cars

P3131 Fiat Uno Left Front Wheel Pressure Reduction Performance Problem
P3131 Siata Coupe Intake Air Temperature Sensor 2 Circuit Range/Performance
P3131 Ford Royale Mirror Passenger Left Circuit Short To Battery
P3131 Fpv Bf Multi-faults - Bank 1 - With Low Side Shorts
P3131 Toyota Tercel Passenger Power Window Motor Circuit Failure
P3131 Lotus Elan TP (Mechanical) Circuit Malfunction
P3131 Singer 9 Internal Voltage Regulator Malfunction