C0198 Diagnostic Trouble Code

C0198 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 C0198 diagnostic trouble code may include:

Reduction in engine performance, especially at low RPM levels
Vacuum leak on the engine
Diminished fuel efficiency
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

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.
Dirty air cleaner element Damaged DPF

Repair Processes :

Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness. 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 C0198 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 C0198.

Fortunately, C0198 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0198 Trouble Code For Specific Cars

C0198 Subaru R2 License Lamp Circuit Failure
C0198 Caterham 7 Door Ajar RR Circuit Failure
C0198 Subaru Forester Left Front Sensor Circuit Short to Vbat
C0198 Austin Mini Aux A/C Blower Speed 1 Circuit Failure
C0198 Daimler 4.2 Hazard Flash Output Circuit Short Battery
C0198 Kia Kcv Seat Track Position Switch Circuit Open
C0198 Opel Caravan Decklid Ajar Rear Door Circuit Short To Ground