B212D Diagnostic Trouble Code

B212D 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 B212D 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
Diminished fuel efficiency

Possible Causes :

Fuel with a large percentage of sulfur will clog the DPF quickly
The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio. If the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for.

Process Tips

Diagnostic trouble code B212D 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 B212D.

Fortunately, B212D is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B212D Trouble Code For Specific Cars

B212D Nissan Pintara Cooling Fan Driver Fault
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B212D Bentley Continental Gt Battery Power Supply ECU Circuit Short To Ground
B212D Fiat 12 Hp Kickdown Relay Hold Circuit Fault
B212D Lancia Y10 STEERING Wheel Angle 1and 2 Signal Faulted
B212D Benz 16 Blower Switch Failure
B212D Renault Master 2 Headlamp Aim Output Relay Circuit Short To Battery