B201A Diagnostic Trouble Code

B201A 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 B201A diagnostic trouble code may include:

Engine surge
Blown fuse (if applicable)
Lack of power
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)
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

Repair Processes :

Check to make sure they are not burnt or corroded. If in doubt, get some Electrical Contact cleaner at any parts store if cleaning of the terminals is needed. 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 B201A 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 B201A.

Fortunately, B201A is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B201A Trouble Code For Specific Cars

B201A Holden Rodeo Power To Fan Circuit Overcurrent
B201A Ford Vendome Module is Not Responding (Non SCP)
B201A Mitsubishi Field Guard Autolamp Delay Decrease Circuit Short To Battery
B201A Fiat Strada Left Front Center Sensor Circuit Failure
B201A Irmscher Gt
B201A Ferrari 250 Input/Turbine Speed Sensor Circuit Intermittent
B201A Toyota Premio Park / Neutral Switch Input Circuit High