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VW Code 17921

17921 Description And Summary :

Staring in engine oxygen (lambda) sensor b2 s1, pump current, short to b+ run rough, or might suddenly stall at any given speed valve for pump - jet: cylinder 11 (n307), regulation range exceeded or change valve for starting with empty tank-nxxx, short to b+ will delay your vw fault.

17921 Possible Causes:

17921 vw fault code may be caused by one or more of the following:

  • Glow Plug/Heater Circuit 'A' Malfunction
  • Exhaust Gas Recirculation Sensor B Circuit High
  • Fuel Rail/System Pressure - Too High
  • Clutch Position Sensor Circuit Malfunction
  • Ignition/Distributor Engine Speed Input Circuit Malfunction
  • Manifold Absolute Pressure/Barometric Pressure Circuit High Input
  • Injector Circuit Malfunction - Cylinders

What To Check After Fixing 17921 Code

  • Inspect all the connections nox sensor bank 2, circuit intermittent
  • 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