B3079 Diagnostic Trouble Code

B3079 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 B3079 diagnostic trouble code may include:

The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly
Faulty or damaged wiring
Hesitation upon 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)
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem. 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 B3079 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 B3079.

Fortunately, B3079 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B3079 Trouble Code For Specific Cars

B3079 Marmon Raceabout Transmission 4-Wheel Drive Low Indicator Short Circuit To Ground
B3079 Caterham 485r Door Ajar LR Circuit Short To Ground
B3079 Citroen C3 Ii Front Wiper Select Switch "B" Short to Ground
B3079 Renault Captur 2 Gear Shift Lock Solenoid Circuit High
B3079 Jaguar Concept Seat Driver Forward Circuit Failure
B3079 Plymouth Colt Evaporative Emission Control System Pressure Sensor Low Input
B3079 Mercedes Sl 350 Air Bag Crash Sensor #2 Feed/Return Circuit Failure