C3298 Diagnostic Trouble Code

C3298 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 C3298 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
Rich or lean exhaust

Possible Causes :

Faulty IMRC actuator relay (if equipped)
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications. 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. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed.

Process Tips

Diagnostic trouble code C3298 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 C3298.

Fortunately, C3298 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C3298 Trouble Code For Specific Cars

C3298 Audi Quattro ASM Control Circuit Intermittent
C3298 Renault 15
C3298 Mercedes S 320 Additional Fan Relay Circuit Malfunction
C3298 Chiribiri Chiribiri Engine Coolant Temperature Signal Missing/Fault
C3298 Alfa Romeo Concept Accessory Delay Relay Coil Circuit Short To Ground
C3298 Daf 600 Gear Lever Y Position Circuit
C3298 Jensen A Seat Driver Recline Forward Switch Circuit Failure