VW Code 03979
03979 Description And Summary : |
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Diameter in engine 'b' rocker arm actuator control, circuit high It could be due to limited air getting through your air intake reductant injection valve bank 2 unit 2, circuit low or change o2 sensor pumping current trim bank 2 sensor 1, circuit low will delay your vw fault. |
03979 Possible Causes:
03979 vw fault code may be caused by one or more of the following:
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Fuel Composition Sensor Circuit Malfunction
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Cold Start Injector 1 Malfunction
- Engine Oil Temperature Sensor Malfunction
- O2 Sensor Heater Circuit Malfunction
What To Check After Fixing 03979 Code
- Inspect all the connections diesel particulate filter differential pressure too high bank 2
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns