C2381 Diagnostic Trouble Code

C2381 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 C2381 diagnostic trouble code may include:

Lack of power
Faulty O2 Sensor
Poor acceleration
Rich or lean exhaust

Possible Causes :

Faulty IMRC actuator relay (if equipped)
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.

Repair Processes :

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. 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. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code C2381 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 C2381.

Fortunately, C2381 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C2381 Trouble Code For Specific Cars

C2381 Volvo 242
C2381 Fiat Egea Lamp Seat Belt Circuit Open
C2381 Rover 14 Idle Control System RPM lower Than Expected
C2381 Triumph Bonneville 1200 Passenger's Seat Forward Switch Circuit Short to Battery
C2381 Ford Interceptor Mirror Driver Right Circuit Open
C2381 Audi C Anti Theft Input Signal Circuit Short To Battery
C2381 Heuliez Pregunta Passenger's Seat Occupied Switch Circuit Short to Ground