B1A6B Diagnostic Trouble Code

B1A6B 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 B1A6B 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. Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications.

Process Tips

Diagnostic trouble code B1A6B 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 B1A6B.

Fortunately, B1A6B is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B1A6B Trouble Code For Specific Cars

B1A6B Isuzu I-290 SCP (J1850) Invalid or Missing Data for Tires
B1A6B Jaguar Xk Seat Driver Occupied Switch Circuit Open
B1A6B Fiat Palio Lamp Turn Signal Rear Output Circuit Short To Battery
B1A6B Suzuki X-90 Mirror Driver Vertical Switch Circuit Failure
B1A6B Ferrari P2 KAM Voltage Too Low
B1A6B Nissan Cefiro Climate Control Temperature Differential Circuit Short To Ground
B1A6B Skoda 105 IP Power Sliding Door Open/Close switch Ckt Short to Gnd