P0079 Diagnostic Trouble Code

P0079 is a kind of OBD-II Diagnostic P-Powertrain 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 P0079 diagnostic trouble code may include:

Fuel pressure too low
Rich or lean exhaust
Diminished fuel efficiency
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.
Faulty IMRC actuator/sensor

Repair Processes :

Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. 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. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code P0079 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 P0079.

Fortunately, P0079 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P0079 Trouble Code For Specific Cars

P0079 Bugatti Type 23 Cylinder 1 Injector Circuit High
P0079 Peugeot 308 Ii EGR Drive Overcurrent
P0079 Bond Bug Contactor Circuit Failure
P0079 Fiat 16 Hp Lack Of HO2S Switch - Sensor Indicates Rich
P0079 Ford Thunderbird Mirror Passenger Vertical Switch Circuit Short To Ground
P0079 Arab 2-litre Air Suspension LR Air Spring/Shock Solenoid Output Circuit Open
P0079 Lincoln Neiman Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance Problem