P068D Diagnostic Trouble Code

P068D 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 P068D 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 :

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

Process Tips

Diagnostic trouble code P068D 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 P068D.

Fortunately, P068D is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P068D Trouble Code For Specific Cars

P068D Volkswagen Citi Reverse Input Circuit
P068D Lamborghini Miura Solar Radiation Sensor Circuit Open
P068D Rch 25 Fuel Volume Regulator Control Circuit Low
P068D Volvo 142
P068D Atalanta 1.5-litre Air Temperature External Sensor Circuit Short To Ground
P068D Plymouth Neon Evaporative Emission Control System Vent Control Circuit Open
P068D Volkswagen 1300 Rear Cargo Door Lock Circuit Short to Ground