C0100 Diagnostic Trouble Code

C0100 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 C0100 diagnostic trouble code may include:

Blown fuse (if applicable)
Engine surge
Reduction in engine performance, especially at low RPM levels
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)
Dirty air cleaner element Damaged DPF

Repair Processes :

If all testing has passed so far yet you still have the same code, check your scan tool and see if it can open and close the IMRC valve. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. 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 C0100 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 C0100.

Fortunately, C0100 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0100 Trouble Code For Specific Cars

C0100 Innocenti Elba SCP (J1850) Invalid or Missing Data for Ignition Switch / Starter
C0100 Mercury Zephyr Air Suspension RF Air Spring Solenoid Output Circuit Open
C0100 Ssangyong Rexton Lamp Headlamp High-Beam Circuit Short To Battery
C0100 Arrol-johnston 15.9 Air Suspension Rear Inflator Solenoid Output Circuit Short To Battery
C0100 Alfa Romeo Gp159 Air Assist Control Valve Range/Performance
C0100 Honda Acura Rl Pressure Control Solenoid B Performance
C0100 Suzuki Cervo Memory Set Switch Circuit Failure