B0518 Diagnostic Trouble Code

B0518 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 B0518 diagnostic trouble code may include:

Misfire
Misfire
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 :

Fuel with a large percentage of sulfur will clog the DPF quickly
The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness. Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble.

Process Tips

Diagnostic trouble code B0518 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 B0518.

Fortunately, B0518 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B0518 Trouble Code For Specific Cars

B0518 Volkswagen T6 SCP (J1850) Invalid or Missing Data for Air Conditioning Clutch
B0518 Opel Astra Data Mismatch #2 (receive data does not match what was expected)
B0518 Aero Type 50 ABS Outlet Valve Coil LR Circuit Open
B0518 Mazda Spiano A/C Compressor Temperature Sensor Malfunction
B0518 Volvo S40
B0518 Ford Fairmont
B0518 Fiat 1600 Lack Of HO2S12 Switch - Sensor Indicates Rich