C0001 Diagnostic Trouble Code

C0001 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 C0001 diagnostic trouble code may include:

Malfunction Indicator Lamp (MIL) illuminated
Carbon Buildup on O2 Sensor
Poor fuel economy
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

Possible Causes :

A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
Faulty IMRC actuator/sensor
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed. If the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for. Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness.

Process Tips

Diagnostic trouble code C0001 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 C0001.

Fortunately, C0001 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0001 Trouble Code For Specific Cars

C0001 Allard Lwb Air Bag Driver Circuit Resistance Low or Shorted Together
C0001 Ford Focus 3 Mirror Driver Down Short To Ground
C0001 Princess 2200 Fuel Rail/System Pressure - Too High
C0001 Rover P5b Ignition Cylinder Sensor Battery Short
C0001 Volkswagen Crosstouran RF LAMP HIGH BEAM CIRCUIT Short to Battery
C0001 Porsche Boxster Type 981 Fuel Pressure Regulator 1 Control Circuit High
C0001 Moretti 127 Battery Saver Relay Coil Circuit Short To Ground