C0313 Diagnostic Trouble Code

C0313 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 C0313 diagnostic trouble code may include:

Cherry red hot catalytic converter
Poor acceleration
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
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)
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

If all testing has passed so far yet you still have the same code, check your scan tool and see if it can open and close the IMRC valve. 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.

Process Tips

Diagnostic trouble code C0313 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 C0313.

Fortunately, C0313 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0313 Trouble Code For Specific Cars

C0313 Fiat 502 Lamp Anti-Theft Indicator Circuit Short To Battery
C0313 Suzuki Alto Vi Memory 1 Switch Circuit Open
C0313 Leyland Austin Theft Deterrent Fuel Enable Signal Not Received/ B+ Supply To VCRM A/C Circuit Malfunction
C0313 Toyota Land Cruiser Oil Pressure Switch Failure
C0313 Peugeot Expert Iii Engine Coolant Level Lamp Circuit Short to Ground
C0313 Volkswagen Sharan SCP (J1850) Communication Bus Fault
C0313 Humber Sceptre Right Rear Stop lamp Circuit Failure