P068E Diagnostic Trouble Code

P068E 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 P068E diagnostic trouble code may include:

Poor acceleration
Cherry red hot catalytic converter
Possible spark knock (detonation / pre-ignition)
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)
A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.

Repair Processes :

Now, clear the codes and test-drive the vehicle to see if the code is reset. 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 P068E 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 P068E.

Fortunately, P068E is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P068E Trouble Code For Specific Cars

P068E Zastava 1500 SCP (J1850) Invalid or Missing Data for Vehicle Id (VIN)
P068E Mercedes-benz 130 Air Bag Driver Circuit Short to Ground - Loop #2
P068E Chevrolet Relsamo EIC Switch-1 Assembly Circuit Short To Battery
P068E Auburn 4-44 Airbag Deployment Indication Input Fault
P068E Gaz M-20 O2 Sensor Circuit Slow Response (Bank 2 Sensor 3)
P068E Jaguar X-type Seat Driver Rear Down Circuit Short To Ground
P068E Rover 60 Ignition Coil C Primary Circuit Malfunction