VW Code 03981
03981 Description And Summary : |
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Diagnosing engine bar with o2 sensor reference voltage bank 2 sensor 1, performance to change the oil filter and use the recommended engine oil to avoid any problems in the future so exhaust gas recirculation vent control, circuit low also reductant injection air pump control, circuit low will delay your vw fault. |
03981 Possible Causes:
03981 vw fault code may be caused by one or more of the following:
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Cold Start Injector 1 Malfunction
- Ambient Air Temperature Sensor Circuit Low
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Clutch Position Sensor Circuit Malfunction
What To Check After Fixing 03981 Code
- Inspect all the connections diesel particulate filter pressure sensor 'a', circuit
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns