P205B Diagnostic Trouble Code

P205B is a kind of OBD-II Diagnostic P-Powertrain 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 P205B 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 :

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.
Defective ECU strategies or components will prevent proper regeneration
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed. 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. 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 P205B 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 P205B.

Fortunately, P205B is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P205B Trouble Code For Specific Cars

P205B Kia Sephia Secondary Air Injection System Switching Valve A Circuit Shorted
P205B Ford Wagon Motor # 1 Input Circuit Failure
P205B Vector W PRNDL Switch Circuit Failure
P205B Volkswagen Passat B5 Right Rear Stop lamp Circuit Short to Battery
P205B Maserati Spyder Transmission Mechanical Failure - First And Reverse
P205B Renault Kangoo 2 GPS Antenna Connection Open or Short
P205B Chrysler Dual Cowl ETC Power Less Than Demand