C2303 Diagnostic Trouble Code

C2303 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 C2303 diagnostic trouble code may include:

Excessive exhaust leak
Hesitation upon acceleration
Malfunction Indicator Lamp (MIL) illuminated
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.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

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. Now, clear the codes and test-drive the vehicle to see if the code is reset. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code C2303 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 C2303.

Fortunately, C2303 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C2303 Trouble Code For Specific Cars

C2303 Bugatti Type 44 Cylinder 11 Injector Circuit High
C2303 Ferrari 206 Injector High Side Open - Bank 2/Target idle not reached
C2303 La Salle Saloon Servo Motor Potentiometer Foot Circuit Short To Ground
C2303 Mbm Coupe Tourism A/C Post Heater Sensor Circuit Short To Ground
C2303 Osca 2500 Door Unlock Disarm Output Circuit Failure
C2303 Chrysler Airflow Engine Oil Temperature Sensor Low
C2303 Volkswagen Passat B6 Right Rear Turn Lamp Circuit Failure