C2301 Diagnostic Trouble Code

C2301 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 C2301 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. 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.

Process Tips

Diagnostic trouble code C2301 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 C2301.

Fortunately, C2301 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C2301 Trouble Code For Specific Cars

C2301 Irmscher Gt
C2301 Alfa Romeo 149 ABS Outlet Valve Coil RR Circuit Failure
C2301 Shanghai Sedan Insufficient Engine Speed Increase During Self Test
C2301 Mega Monte Carlo A/C Refrigerant Temperature Sensor/Circuit Malfunction
C2301 Noble M14 Cylinder 10 Injector Circuit High
C2301 Alta 2-litre Air Bag Passenger Pressure Switch Circuit Open
C2301 Mitsubishi Celeste Audio Rear Control Unit is Not Responding