C12C2 Diagnostic Trouble Code

C12C2 is a kind of OBD-II Diagnostic C-Chassis 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 C12C2 diagnostic trouble code may include:

Faulty PCM
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Poor acceleration
Rich or lean exhaust

Possible Causes :

The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Fuel with a large percentage of sulfur will clog the DPF quickly
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications.

Process Tips

Diagnostic trouble code C12C2 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 C12C2.

Fortunately, C12C2 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C12C2 Trouble Code For Specific Cars

C12C2 Proton Gen Fuel Sender Circuit Open
C12C2 Subaru 1600 Lateral Accelerometer Signal Fault
C12C2 Datsun 2300 High Mount Stop Lamp Circuit Failure
C12C2 Maserati Mc12 Transmission Fluid Pressure Sensor/Switch F Circuit High
C12C2 Delahaye Gfa Hydraulic Pressure Sensor Range/Performance
C12C2 Chrysler Conquest Engine Speed Input Circuit Intermittent
C12C2 Panhard Dyna Driver Power Window Down Switch Circuit Failure