C0964 Diagnostic Trouble Code

C0964 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 C0964 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
Engine surge

Possible Causes :

Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

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

Process Tips

Diagnostic trouble code C0964 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 C0964.

Fortunately, C0964 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0964 Trouble Code For Specific Cars

C0964 Lotus Europa Traction Control Motor Circuit Open
C0964 Tvr Speed Power Sliding Detent (Latch) Circuit Failure
C0964 Allard Safari Air Bag Driver Inflator Circuit Resistance Low on Squib - Loop #2
C0964 Jaguar R Seat Driver Front Down Circuit Failure
C0964 Farboud Gts Injector Circuit Open / Shorted - Cylinder #3
C0964 Peugeot Quadricycle Engine Coolant Temperature Circuit Malfunction
C0964 Oldsmobile Intrique Cylinder Head Overtemperature Protection Active