U0179 Diagnostic Trouble Code

U0179 is a kind of OBD-II Diagnostic U-Network 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 U0179 diagnostic trouble code may include:

Fuel pressure too low
Rich or lean exhaust
Diminished fuel efficiency
Engine surge

Possible Causes :

Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Faulty IMRC actuator/sensor

Repair Processes :

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. Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio.

Process Tips

Diagnostic trouble code U0179 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 U0179.

Fortunately, U0179 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U0179 Trouble Code For Specific Cars

U0179 Amc Eagle Air Suspension Front Height Sensor High (SE) Signal Circuit Short To Ground
U0179 Tata Nano Mirror Passenger Vertical Feedback Potentiometer Circuit Short to Ground
U0179 Oldsmobile Toronado Damper Low Side Rear Circuit Failure
U0179 Suzuki Vitara Mirror Driver Up Circuit Short To Battery
U0179 Nissan Pintara Cooling Fan Driver Fault
U0179 Glas 1300 Over Temperature Fault
U0179 Land Rover Discovery 2 Steering Column Switch Circuit Short to Battery