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 Fiat Idea Lamp Turn Signal Front Output Circuit Open
B12AD Amc Rambler Air Suspension Gate Solenoid Output Circuit Short To Battery
B12AD Lanchester Dauphin Speed Vehicle Signal Circuit Failure
B12AD Buick Signia Damper Circuit Failure
B12AD Suzuki Swift Mirror Driver Right Circuit Short To Battery
B12AD Kia Forte Ii Seat Switch Reference Voltage Positive Common Open Circuit
B12AD Ford Cortina Main Blower Motor Relay Circuit Short to Battery