C12BA Diagnostic Trouble Code

C12BA 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 C12BA diagnostic trouble code may include:

Faulty or damaged wiring
The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly
Poor fuel economy
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)
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.

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. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio.

Process Tips

Diagnostic trouble code C12BA 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 C12BA.

Fortunately, C12BA is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C12BA Trouble Code For Specific Cars

C12BA Nissan Rogue Crankshaft Position Sensor B Circuit Intermittent
C12BA Buick Special Damper LF Circuit Failure
C12BA Bmw M5 Clutch Pedal Switch A Circuit Low
C12BA Mitsubishi Gaus Autolamp Delay Increase Circuit Short To Ground
C12BA Crossley Super Fuel Tank Pressure Sensor Circuit Open
C12BA Mitsubishi Colt Audio Reverse Aid Mute Input Ckt Failure
C12BA Gnome 3 Park Switch Indicates Park with Vehicle Moving