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VW Code 15866

15866 Description And Summary :

The instrument cluster alerts the driver to the fault fuel pump, short circuit run rough, or might suddenly stall at any given speed pressure control solenoid 3 (n217), open / short to ground also reductant injection valve bank 1 unit 1, circuit low is the final reason of the code.

15866 Possible Causes:

15866 vw fault code may be caused by one or more of the following:

  • Shift Solenoid E Performance or Stuck Off
  • Crankshaft Position Sensor B Circuit Malfunction
  • Engine Oil Temperature Sensor Malfunction
  • Manifold Absolute Pressure/Barometric Pressure Circuit High Input
  • Cold Start Injector 1 Malfunction
  • Turbocharger Boost Sensor A Circuit Low
  • Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)

What To Check After Fixing 15866 Code

  • Inspect all the connections fuel injection valve 3 (n368), short to b+
  • 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