P1179 Diagnostic Trouble Code

P1179 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 P1179 diagnostic trouble code may include:

The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Faulty PCM
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Reduction in engine performance, especially at low RPM levels

Possible Causes :

Dirty air cleaner element Damaged DPF
A plugged converter will cause of host of driveability problems as well as set this code. A severely plugged converter will result in the inability to increase rpm when under load. Look for a code such as P0421 -- catalytic converter efficiency below threshold if the converter indicating a faulty converter.
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. 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.

Process Tips

Diagnostic trouble code P1179 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 P1179.

Fortunately, P1179 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1179 Trouble Code For Specific Cars

P1179 Alfa Romeo 22 ABS System Is Not Operational
P1179 Nissan Primastar Crankshaft Position Camshaft Position Correlation (Bank 1 Sensor A)
P1179 Lea-francis 1.5-litre System Voltage Low
P1179 Healey Nash-healey Passenger's Front Seat Down Switch Circuit Short to Battery
P1179 Volkswagen Eurovan Ride Control LF Shock Actuator Circuit Failure
P1179 Chevrolet Tahoe Electronic Throttle Monitor Data Available
P1179 Mitsubishi L300 Autolamp Sensor Input Circuit Short To Battery