P2BAC Diagnostic Trouble Code

P2BAC is a kind of OBD-II Diagnostic P-Powertrain 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 P2BAC 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 :

Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

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. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors.

Process Tips

Diagnostic trouble code P2BAC 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 P2BAC.

Fortunately, P2BAC is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P2BAC Trouble Code For Specific Cars

P2BAC Mercedes C 280 ABS Inlet Valve Coil LR Circuit Failure
P2BAC Jaguar X-type Seat Driver Rear Down Circuit Short To Ground
P2BAC Keller Super Chief Seat Passenger Memory Position Error
P2BAC Chevrolet Tahoe Electronic Throttle Monitor Data Available
P2BAC Bmw Z3 Column Tilt Feedback Potentiometer Circuit Open
P2BAC Datsun 260 High Vehicle Speed Observed in Park
P2BAC Renault Megane Heated Backlite Input Circuit Open