P0468 Diagnostic Trouble Code

P0468 is a kind of OBD-II Diagnostic P-Powertrain 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 P0468 diagnostic trouble code may include:

Blown fuse (if applicable)
Engine surge
Reduction in engine performance, especially at low RPM levels
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)
Dirty air cleaner element Damaged DPF

Repair Processes :

If all testing has passed so far yet you still have the same code, check your scan tool and see if it can open and close the IMRC valve. 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.

Process Tips

Diagnostic trouble code P0468 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 P0468.

Fortunately, P0468 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P0468 Trouble Code For Specific Cars

P0468 Renault Torpedo HO2S Heater Control Circuit High (Bank 1 Sensor 1)
P0468 Ford Bantam License Lamp Circuit Short to Battery
P0468 Triumph Roadster PATS Transceiver Module Signal Is Not Received
P0468 Mercedes S 320 Additional Fan Relay Circuit Malfunction
P0468 Toyota Rt Park Lamp Relay Coil Circuit Failure
P0468 Ac 5 AAI Circuit Malfunction
P0468 Lamborghini Diablo Shift Time Too Long