C0099 Diagnostic Trouble Code

C0099 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 C0099 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
Diminished fuel efficiency

Possible Causes :

Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. 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. If you find a related TSB, the information will often help in diagnosing the code in question as TSBs are crested from many thousands of repairs.

Process Tips

Diagnostic trouble code C0099 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 C0099.

Fortunately, C0099 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0099 Trouble Code For Specific Cars

C0099 Volkswagen Beetle Rear Wiper Select Switch "E" Short to Ground
C0099 Adams 16 ABS Inlet Valve Coil Rear Circuit Short To Ground
C0099 Nissan Gazelle Clutch Position Sensor Circuit Intermittent Malfunction
C0099 Daf 33 Gear Lever Push - Pull Switch (Shift Anticipate)
C0099 Ferrari 735 Intake Valve Control Solenoid Circuit Low (Bank 2)
C0099 Maserati 2.24v Transmission Automatic Hall Effect Sensor Power Circuit Failure
C0099 Mercedes Cl 600 ABS Inlet Valve Coil RF Circuit Short To Battery