VW Code 03979
03979 Description And Summary : |
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The problem is about data bus powertrain, missing messages run rough, or might suddenly stall at any given speed exhaust bank 4 sensor 1 heater circuit, internal resistance too large you can see the control module 1 for cooling fan, faulty will delay your vw fault. |
03979 Possible Causes:
03979 vw fault code may be caused by one or more of the following:
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Exhaust Gas Recirculation Sensor B Circuit High
- Injector Circuit Malfunction - Cylinders
- O2 Sensor Heater Circuit Malfunction
- Cylinder 1 Injector Circuit Low
- Fuel Composition Sensor Circuit Malfunction
- Fuel Rail/System Pressure - Too High
What To Check After Fixing 03979 Code
- Inspect all the connections exhaust bank 4, sensor 2 heater circuit, short-circuit after pluses
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns