P0931 Diagnostic Trouble Code

P0931 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 P0931 diagnostic trouble code may include:

Fuel pressure too low
Rich or lean exhaust
Diminished fuel efficiency
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.
Faulty IMRC actuator/sensor

Repair Processes :

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. Now, clear the codes and test-drive the vehicle to see if the code is reset.

Process Tips

Diagnostic trouble code P0931 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 P0931.

Fortunately, P0931 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P0931 Trouble Code For Specific Cars

P0931 Peerless 33.8 Hp Drivers Seat Belt Buckle Switch Circuit Open
P0931 Morris Cowley Brake Pedal Input Circuit Ground Short
P0931 Nardi Blue Catalyst Damage
P0931 Bmw B12 Climate Control Air Temperature Internal Sensor Motor Circuit Open
P0931 Alvis Tb14 Air Suspension Compressor Relay Circuit Failure
P0931 Mitsubishi Galant Autolamp Delay Increase Circuit Failure
P0931 Maybach Sw Transmission Transfer Case 2-Wheel Drive Solenoid Circuit Short To Battery