B2279 Diagnostic Trouble Code

B2279 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 B2279 diagnostic trouble code may include:

The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Faulty PCM
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
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.
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground.

Process Tips

Diagnostic trouble code B2279 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 B2279.

Fortunately, B2279 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B2279 Trouble Code For Specific Cars

B2279 Citroen 11 Fan Relay (High) Circuit Malfunction
B2279 Artega Gt Air Suspension Rear Pneumatic Failure
B2279 Proton Wira Fuel Temperature Sensor #1 Circuit Open
B2279 Vaz Lada PRNDL Reverse Input Circuit Failure
B2279 Premier Padmini Fuel Rail Pressure Sensor Circuit Intermittent
B2279 Peugeot 408 EIC Switch-1 Assembly Circuit Short To Battery
B2279 Pontiac Lemans Fan Control Circuit Malfunction