B0313 Diagnostic Trouble Code

B0313 is a kind of OBD-II Diagnostic B-Body 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 B0313 diagnostic trouble code may include:

Faulty O2 Sensor
Lack of power
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

An air leak forward of the DPF will change the sensor readings resulting in the code
Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
Fuel with a large percentage of sulfur will clog the DPF quickly

Repair Processes :

It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem. Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector.

Process Tips

Diagnostic trouble code B0313 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 B0313.

Fortunately, B0313 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B0313 Trouble Code For Specific Cars

B0313 Zagato Isocity SCP (J1850) Invalid or Missing Data for Traction Motor
B0313 Mercedes C 200 ABS Hydraulic Pump Motor Circuit Short To Ground
B0313 Mercedes Slk 300 Air Bag Diagnostic Monitor Ground Circuit Short To Ground
B0313 Humber Snipe Right Rear Stop lamp Circuit Short to Battery
B0313 Simca Montlhery Interior Lamp Override Switch Open Circuit
B0313 Bertone Birusa Brake Motor Warning lamp Circuit Failure
B0313 Kia Xedos Servo Motor Foot Circuit Failure