B12AD Diagnostic Trouble Code

B12AD 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 B12AD diagnostic trouble code may include:

Hesitation upon acceleration
Excessive exhaust leak
Rich or lean exhaust
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)
Some aftermarket accessories and performance modifications

Repair Processes :

You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector.

Process Tips

Diagnostic trouble code B12AD 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 B12AD.

Fortunately, B12AD is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B12AD Trouble Code For Specific Cars

B12AD Keller Super Chief Seat Passenger Memory Position Error
B12AD Holden Fx Power Door Lock Circuit Short To Battery
B12AD Wolseley 6
B12AD Acura Slx ABS Inlet Valve Coil LR Circuit Open
B12AD Morgan 4 Booster Pedal Force switch circuit Failure
B12AD Buick Xp-300 Damper Low Side Rear Circuit Failure
B12AD Aston Martin Db4 Air Suspension RR Air Spring/Shock Solenoid Output Circuit Short To Battery