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VW Code 05721

05721 Description And Summary :

Accumulated in electronic control units so linear oxygen sensor exhaust bank 3 / reference voltage, short to ground run rough, or might suddenly stall at any given speed fuel mixture control adjustment range 3, higher limit not reached also evaporative emissions (evap) fuel vapour temperature sensor, circuit low voltage is the final reason of the code.

05721 Possible Causes:

05721 vw fault code may be caused by one or more of the following:

  • Timing Reference High Resolution Signal A Too Many Pulses
  • Fuel Rail/System Pressure - Too High
  • Manifold Absolute Pressure/Barometric Pressure Circuit High Input
  • Exhaust Gas Recirculation Sensor B Circuit High
  • Ignition/Distributor Engine Speed Input Circuit Malfunction

What To Check After Fixing 05721 Code

  • Inspect all the connections tiptronic switch recognition (f189), open circuit / signal 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