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2005 AUDI TT
3.2L VR6•AWD•DCT•gas•BHE
1 active safety recall on this vehicle — view recalls
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Repairs0Labor496Torque3142Fluid10DTC1029Battery1Maintenance0Recalls1
U0101high severityNetwork

Lost Communication with TCM

on 2005 Audi TT 3.2L VR6 · AWD

What this code means

Cannot communicate with the Transmission Control Module.

Symptoms

  • Check Engine Light
  • Transmission in limp mode
  • Harsh shifting or no shifting
  • Trans warning light

Common causes

  • TCM power/ground failure
  • CAN bus wiring to TCM
  • TCM failure
  • Fuse blown

Diagnostic steps

  1. Check TCM fuses
  2. Test power and ground at TCM
  3. Check CAN bus wiring
  4. Try direct communication with TCM

Repair notes

Check fuses and power supply. Verify CAN bus.

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