B2079 Diagnostic Trouble Code

B2079 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 B2079 diagnostic trouble code may include:

Malfunction Indicator Lamp (MIL) illuminated
Carbon Buildup on O2 Sensor
Poor fuel economy
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.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

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. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed. You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data.

Process Tips

Diagnostic trouble code B2079 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 B2079.

Fortunately, B2079 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B2079 Trouble Code For Specific Cars

B2079 Riley Kestrel Horn Switch Circuit Failure
B2079 Nissan 720 Climate Control A/C Post Evaporator Sensor Circuit Failure
B2079 Porsche Karisma Fuel Pump Secondary Circuit Intermittent
B2079 Allard K1 Air Bag Driver Circuit Failure
B2079 Aixam Evolution ABS Outlet Valve Coil LR Circuit Short To Battery
B2079 Chrysler Grand Voyager Evaporative Emission Control System Incorrect Purge flow
B2079 Ginetta G3 Open Power To Ground VCRM