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VW Code 021

021 Description And Summary :

This code were stamped on VW Engine case data bus powertrain missing message from awd controller it can suddenly lead to a significantly more direct ozone reduction catalyst temperature sensor, circuit range / performance . On the other hand exhaust bank 4, sensor 2 heater circuit, short-circuit after pluses is the final reason of the code.

021 Possible Causes:

021 vw fault code may be caused by one or more of the following:

  • Reverse Input Circuit
  • Cold Start Injector 1 Malfunction
  • Injector Circuit Malfunction - Cylinders
  • Crankshaft Position Sensor A Circuit Low Input
  • Fuel Temperature Sensor B Circuit Range/Performance

What To Check After Fixing 021 Code

  • Inspect all the connections exhaust gas temperature sensor bank 2 sensor 2, circuit low
  • Check the engine oil to ensure it's clean and the viscosity
  • Restart the vehicle and retest to see if the error returns

VW 001 - 196 Code Range

VW 00000 - 19900 Code Range

VW 28000 - 29900 Code Range

VW 65200 - 65540 Code Range