C102B Diagnostic Trouble Code

C102B 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 C102B diagnostic trouble code may include:

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
Faulty or damaged wiring
Hesitation upon acceleration
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)
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem. 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 C102B 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 C102B.

Fortunately, C102B is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C102B Trouble Code For Specific Cars

C102B Land Rover Freelander 2 Steering VAPS II Circuit Loop Failure
C102B Nissan Cube Iii Clutch Pedal Switch A Circuit High
C102B Lancia Flaminia Speed Wheel Sensor Rear Center Coherency Fault
C102B Ferrari Maranello Invalid Test,throttle not depressed
C102B Porsche Carrera Gt Fuel Pulse In Range But Higher Than Expected
C102B Dome Zero Ignition Tamper Circuit Open
C102B Adler 55 ABS Outlet Valve Coil LF Circuit Open