C3468 Diagnostic Trouble Code

C3468 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 C3468 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 :

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. 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. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code C3468 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 C3468.

Fortunately, C3468 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C3468 Trouble Code For Specific Cars

C3468 Marcos Mantara Transmission 4-Wheel Drive Clutch Relay Circuit Failure
C3468 Hotchkiss Torpedo Ride Control LR Shock Actuator Circuit Open
C3468 Cottin-desgouttes 60 Fuel Stepper Motor Malfunction
C3468 Hyundai Veracruz SCP (J1850) Invalid or Missing Data for Engine RPM
C3468 Morris Oxford Calibration Memory Fault
C3468 Phantom Corsair Phantom Corsair Engine Oil Temperature Sensor Intermittent
C3468 Chevrolet Silverado EIC Switch-2 Assembly Circuit Short To Ground