C0098 Diagnostic Trouble Code

C0098 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 C0098 diagnostic trouble code may include:

Engine surge
Blown fuse (if applicable)
Lack of power
Reduction in engine performance, especially at low RPM levels

Possible Causes :

A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
Some aftermarket accessories and performance modifications
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

Repair Processes :

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. 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. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition.

Process Tips

Diagnostic trouble code C0098 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 C0098.

Fortunately, C0098 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0098 Trouble Code For Specific Cars

C0098 Honda Passport Rear Cargo Door Set Switch Stuck (Short to Ground)
C0098 Standard Superior Lamp Headlamp Low-Beam Circuit Short To Ground
C0098 Buick Model 2x-4x Cylinder 9 Contribution/Balance Fault
C0098 Toyota Ipsum Oil Level Switch Circuit Failure
C0098 Paterson Sedan Driver Sliding Door Ajar Circuit Short to GND
C0098 Lexus Ls TCM Power Relay Sense Circuit Range/Performance
C0098 Morgan Model Brake Fluid Level Sensor Input Open Circuit