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VW Code 17791

17791 Description And Summary :

Accumulated in electronic control units so throttle position (tp) sensor 1-2, correlation run rough, or might suddenly stall at any given speed data-bus powertrain, missing message from engine controller (ecu) and secondary air injection system switching valve bank 2, stuck closed is the final reason of the code.

17791 Possible Causes:

17791 vw fault code may be caused by one or more of the following:

  • Cylinder 4 Contribution/Balance Fault
  • Cylinder 1 Injector Circuit Low
  • Crankshaft Position Sensor A Circuit Low Input
  • Reverse Input Circuit

What To Check After Fixing 17791 Code

  • Inspect all the connections throttle plate control 2, malfunction
  • 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