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VW Code 08121

08121 Description And Summary :

Accumulated in electronic control units so tiptronic switch down, circuit short to ground It could be due to limited air getting through your air intake signal for back-up lights, short to b+ and hydraulic pressure sensor 1, range / performance is the final reason of the code.

08121 Possible Causes:

08121 vw fault code may be caused by one or more of the following:

  • Engine Oil Temperature Sensor Malfunction
  • Crankshaft Position Sensor A Circuit Malfunction
  • Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
  • Ignition/Distributor Engine Speed Input Circuit Malfunction
  • Fuel Temperature Sensor B Circuit Range/Performance
  • Ambient Air Temperature Sensor Circuit Low
  • Fuel Composition Sensor Circuit Malfunction

What To Check After Fixing 08121 Code

  • Inspect all the connections vehicle speed signal wheel speed from brake control module; range / performance
  • 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