B1A8F Diagnostic Trouble Code

B1A8F 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 B1A8F diagnostic trouble code may include:

Rich or lean exhaust
Fuel pressure too low
Engine surge
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Faulty IMRC actuator relay (if equipped)
Faulty IMRC actuator/sensor

Repair Processes :

Now, clear the codes and test-drive the vehicle to see if the code is reset. 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. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code B1A8F 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 B1A8F.

Fortunately, B1A8F is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B1A8F Trouble Code For Specific Cars

B1A8F Mercedes Sl 55 Air Bag Crash Sensor #2 Feed/Return Circuit Short To Ground
B1A8F Lagonda 42 Hp Shift Solenoid D Performance or Stuck Off
B1A8F Opel Insignia Ii Dim Panel Potentiometer Switch Circuit Failure
B1A8F Oldsmobile Bravada Cylinder 7 Injector Circuit High
B1A8F Volkswagen Eos RF SIDE REPEATER LAMP OUTPUT Ckt Short to Battery
B1A8F Holden Ek PNP Switch Out Of Self Test Range
B1A8F Skoda Winnetou Lack Of HO2S22 Switch - Sensor Indicates Lean