C2068 Diagnostic Trouble Code

C2068 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 C2068 diagnostic trouble code may include:

Faulty or damaged wiring
The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly
Poor fuel economy
Reduction in engine performance, especially at low RPM levels

Possible Causes :

Defective ECU strategies or components will prevent proper regeneration
The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture.
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.

Repair Processes :

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. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio.

Process Tips

Diagnostic trouble code C2068 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 C2068.

Fortunately, C2068 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C2068 Trouble Code For Specific Cars

C2068 Proton Tiara Fuel Tank Temperature Sensor Circuit Malfunction
C2068 Abarth 2000 3-4 Shift Malfunction
C2068 Volkswagen W12 SCP (J1850) Invalid or Missing Data for Cellular Phone / Paging System
C2068 Chrysler Pacifica Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction
C2068 Mitsubishi Space Star Ii Aux Heater Overheat Fault
C2068 Mercedes E 200 ABS Power Relay Coil Circuit Failure
C2068 Ecosse Signature Inductive Signature Chip Communication Error