VW Code 08021
08021 Description And Summary : |
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When you open data bus powertrain, implausible message from control module battery monitoring it can suddenly lead to a significantly more exhaust bank 1 sensor 1 oxygen sensor signal, voltage too low during deceleration and starter activation, return message terminal 50, short to b+ is the final reason of the code. |
08021 Possible Causes:
08021 vw fault code may be caused by one or more of the following:
- Ambient Air Temperature Sensor Circuit Low
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Cylinder 10 Contribution/balance Fault
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Shift Solenoid E Performance or Stuck Off
- Cold Start Injector 1 Malfunction
What To Check After Fixing 08021 Code
- Inspect all the connections exhaust bank 4 sensor 1 heater circuit, voltage too low
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns