B2356 Diagnostic Trouble Code

B2356 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 B2356 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
Hesitation upon acceleration

Possible Causes :

Some aftermarket accessories and performance modifications
A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
An air leak forward of the DPF will change the sensor readings resulting in the code

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. You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data.

Process Tips

Diagnostic trouble code B2356 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 B2356.

Fortunately, B2356 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B2356 Trouble Code For Specific Cars

B2356 Osi 1200 Door Unlock Disarm Switch Circuit Failure
B2356 Triumph Roadster PATS Transceiver Module Signal Is Not Received
B2356 Volvo 123
B2356 Peugeot 508 Ii ELC System 2 Fault
B2356 Volkswagen Touran Ii
B2356 Volkswagen 1-litre Rear Fog Lamp Switch Circuit Failure
B2356 Vaz 2120 PRNDL Input #3 Circuit Failure