P1B2C Diagnostic Trouble Code

P1B2C 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 P1B2C 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
Reduction in engine performance, especially at low RPM levels

Possible Causes :

Dirty air cleaner element Damaged DPF
A plugged converter will cause of host of driveability problems as well as set this code. A severely plugged converter will result in the inability to increase rpm when under load. Look for a code such as P0421 -- catalytic converter efficiency below threshold if the converter indicating a faulty converter.
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed. Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness.

Process Tips

Diagnostic trouble code P1B2C 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 P1B2C.

Fortunately, P1B2C is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1B2C Trouble Code For Specific Cars

P1B2C Cadillac Cts Decklid Ajar Rear Door Circuit Short To Ground
P1B2C Volkswagen Microbus Right Rear Center Sensor Circuit Fault
P1B2C Mercedes C 280 ABS Inlet Valve Coil LR Circuit Failure
P1B2C Pennsylvania F Six Driver's Seat Seatback Autoglide Rearward Switch Circuit Failure
P1B2C Oldsmobile Recon Damper LF Circuit Failure
P1B2C Mg C-type Air Suspension RR Air Spring/Shock Solenoid Output Circuit Open
P1B2C Daewoo Evanda Fuel Volume Regulator Control Circuit/Open