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VW Code 17721

17721 Description And Summary :

The instrument cluster alerts the driver to the fault signal line for fuel pump electronics, electrical malfunction run rough, or might suddenly stall at any given speed data bus powertrain, no message from transmission controller (tcu) . So for next a/c refrigerant pressure sensor 'b', circuit low will delay your vw fault.

17721 Possible Causes:

17721 vw fault code may be caused by one or more of the following:

  • Fuel Composition Sensor Circuit Malfunction
  • Ambient Air Temperature Sensor Circuit Low
  • Injector Circuit Malfunction - Cylinders
  • Fuel Temperature Sensor B Circuit Range/Performance
  • Fuel Rail/System Pressure - Too High
  • Throttle/Pedal Position Sensor/Switch A Circuit Intermittent

What To Check After Fixing 17721 Code

  • Inspect all the connections data bus powertrain, implausible message from control module fuel pump
  • 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