B0578 Diagnostic Trouble Code

B0578 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 B0578 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.
Reduction in engine performance, especially at low RPM levels

Possible Causes :

Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
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. If you find a related TSB, the information will often help in diagnosing the code in question as TSBs are crested from many thousands of repairs.

Process Tips

Diagnostic trouble code B0578 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 B0578.

Fortunately, B0578 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B0578 Trouble Code For Specific Cars

B0578 Lotus 79 Torque Converter/Brake Switch B Circuit Low
B0578 Ford Corcel MAF Sensor Intermittent/ Check of all OBDII Systems Not Complete
B0578 Mitsubishi Sss Auxillary Speed Sensor Fault
B0578 Mg 14 Air Suspension RR Air Compress Request Exceeded Max Timing
B0578 Innocenti Koral
B0578 Mercedes-benz R Class Air Suspension Front Height Sensor High (SE) Signal Circuit Open
B0578 Koenigsegg Ccxr Servo Motor Potentiometer Coolair Circuit Short To Ground