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2011 AUDI Q7
3.0L Supercharged V6•AWD•AUTOMATIC•gas•CJTB•supercharged
4 active safety recalls on this vehicle — view recalls
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Repairs0Labor490Torque3410Fluid10DTC1115Battery1Maintenance0Recalls4
U0130moderate severityNetwork

Lost Communication with Trailer Brake Control Module

on 2011 Audi Q7 3.0L Supercharged V6 · AWD

What this code means

Cannot communicate with the integrated trailer brake controller.

Symptoms

  • Trailer brake warning light
  • Trailer brakes not functioning
  • Trailer brake gain not adjustable
  • Towing mode limited

Common causes

  • Trailer brake module failure
  • Trailer wiring issue
  • CAN bus wiring
  • Module power loss
  • Fuse blown

Diagnostic steps

  1. Check trailer brake module fuse
  2. Test module power and ground
  3. Check trailer connector wiring
  4. Inspect CAN wiring
  5. Test trailer brake output

Repair notes

Check trailer wiring connector first. Verify factory trailer brake module power supply.

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🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
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