B221D Diagnostic Trouble Code

B221D 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 B221D diagnostic trouble code may include:

Cherry red hot catalytic converter
Poor acceleration
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly

Possible Causes :

Defective ECU strategies or components will prevent proper regeneration
The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture.
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

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

Process Tips

Diagnostic trouble code B221D 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 B221D.

Fortunately, B221D is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B221D Trouble Code For Specific Cars

B221D Kia M-car Seatbelt Driver Pretensioner Circuit Open
B221D Heuliez Pregunta Passenger's Seat Occupied Switch Circuit Short to Ground
B221D Acura Rdx ABS Inlet Valve Coil LF Circuit Short To Battery
B221D Toyota Solara Parking Brake Switch Circuit Failure
B221D Mercedes C 280 ABS Inlet Valve Coil LR Circuit Failure
B221D Lizard Project Throttle/Pedal Position Sensor/Switch C Circuit High Input
B221D Acura Tlx ABS Inlet Valve Coil Rear Circuit Open