C0484 Diagnostic Trouble Code

C0484 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 C0484 diagnostic trouble code may include:

The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly
Faulty or damaged wiring
Hesitation upon acceleration
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)
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem. 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 C0484 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 C0484.

Fortunately, C0484 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0484 Trouble Code For Specific Cars

C0484 Griffith Gt Passenger Seatback Rearward Switch Circuit Short to Ground
C0484 Vauxhall Magnum Pressure Control Solenoid A Control Circuit Range/Performance
C0484 Lotus Elise Sc Traction Control Input Signal High
C0484 Seat Tango Input/Turbine Speed Sensor Circuit Malfunction
C0484 Hudson Wasp Right Front Vertical Accelerometer Circuit Failure
C0484 Audi S2 Audio Bezel is Not Responding
C0484 Bugatti Type 73 Cylinder 2 Injector Circuit Low