P0C68 Diagnostic Trouble Code

P0C68 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 P0C68 diagnostic trouble code may include:

Hesitation upon acceleration
Excessive exhaust leak
Rich or lean exhaust
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.
Some aftermarket accessories and performance modifications

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. Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble.

Process Tips

Diagnostic trouble code P0C68 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 P0C68.

Fortunately, P0C68 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P0C68 Trouble Code For Specific Cars

P0C68 Mazda Bt50 Transmission Transfer Case Differential Lock-Up Feedback Switch Short Circuit To Ground
P0C68 Chevrolet Lacetti ECU A/D Converter
P0C68 Borgward Isabella Control Sleeve Sensor Malfunction
P0C68 Innocenti C
P0C68 Locomobile 30 Timing Reference High Resolution Signal A Intermittent/Erratic Pulses
P0C68 Caterham 1700 Door Ajar LR Circuit Failure
P0C68 Ford Concept MAF Ground Malfunction