19804/P3348/013128 – Control Circuit for Controller for Turbocharger 1 (J724): Electrical Malfunction

Possible Symptoms

  • Malfunction Indicator Light (MIL) ON

Possible Causes

  • Fuse(s) faulty
  • Wiring and/or Connector(s) from/to Controller for Turbocharger 1 (J724) faulty
  • Controller for Turbocharger 1 (J724) faulty
  • Faulty Turbocharger

Possible Solutions

  • Check Fuse(s)
  • Check Wiring and/or Connector(s) from/to Controller for Turbocharger 1 (J724)
  • Check/Replace Controller for Turbocharger 1 (J724)
    • Perform (Selective) Output Test, the Vane Positions should change visibly and audibly
    • Perform System Test using VAS 6395
      • See TPI 2016032 for additional information when this DTC is found in vehicles with Siemens E-regulators. That document lists specific environmental conditions shown by the VAS 6395 tool that may help determine if the E-regulator -or- mechanical components such as the Turbocharger itself are faulty.

Special Notes

  • When stored in the 3.0l TDI (ASB/BKS/BMK/BNG) with throttle body faults P106B/004203 and/or 17988/P1580/005504 check the throttle unit and wiring for issues that may be falsely causing the turbocharger fault. This note is in reference to customer feedback, not official TSB or TPI documentation.