B2431 Diagnostic Trouble Code

B2431 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 B2431 diagnostic trouble code may include:

Excessive exhaust leak
Hesitation upon acceleration
Malfunction Indicator Lamp (MIL) illuminated
Rich or lean exhaust

Possible Causes :

Faulty IMRC actuator relay (if equipped)
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

Now, clear the codes and test-drive the vehicle to see if the code is reset. 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. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition.

Process Tips

Diagnostic trouble code B2431 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 B2431.

Fortunately, B2431 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B2431 Trouble Code For Specific Cars

B2431 Audi A6 ANTI THEFT HORN OUTPUT CIRCUIT Failure
B2431 Dixi 6 IAT Sensor (D/C) Open/Short
B2431 Mazda Washu A/C Post Heater Sensor #2 Circuit Failure
B2431 Holden Sv6 Power Window LR Motor Circuit Short To Battery
B2431 Sunbeam-talbot Mk Iii Master Cylinder Pressure Sensor Circuit Failure
B2431 Gaz 210 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)
B2431 Chery J1 DPFE Circuit High Input