B2806 Diagnostic Trouble Code

B2806 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 B2806 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 :

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. If you find a related TSB, the information will often help in diagnosing the code in question as TSBs are crested from many thousands of repairs.

Process Tips

Diagnostic trouble code B2806 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 B2806.

Fortunately, B2806 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B2806 Trouble Code For Specific Cars

B2806 Armstrong Siddeley 18 Air Suspension LR Height Sensor Circuit Short To Battery
B2806 Porsche 930 Fuel Demand Command Signal Circuit Malfunction
B2806 Triumph Gloria Passenger's Seatback Autoglide Rearward Switch Circuit Short to Ground
B2806 Ford Contour MAF Sensor In Range But Lower Than Expected
B2806 Yue Loong Feeling SCP (J1850) Invalid or Missing Data for Time / Date
B2806 Mahindra M2dicr Traction Control Valve RF Circuit Failure
B2806 Peugeot Tepee Engine Oil Pressure Sensor/Switch Low Voltage