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 Suzuki Sx4 Mirror Driver Switch Assembly Circuit Open
P0079 Hyundai I30 SCP (J1850) Invalid or Missing Data for Cellular Phone / Paging System
P0079 Skoda Yeti Lack Of HO2S22 Switch - Sensor Indicates Rich
P0079 Chrysler New Yorker Evaporative Emission Control System Vent Control Circuit Open
P0079 Maybach Sw Transmission Transfer Case 2-Wheel Drive Solenoid Circuit Short To Battery
P0079 Peugeot 206 ECU ROM Checksum Error
P0079 Abarth 2200 4X4 Initialization Failure