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2014 AUDI R8
5.2L V10•AWD•DCT•gas•CTPA
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Repairs0Labor492Torque2167Fluid9DTC1129Battery1Maintenance0Recalls0
U0039low severityNetwork

LIN Bus A (-) Open

on 2014 Audi R8 5.2L V10 · AWD

What this code means

The LIN bus A ground reference is open, preventing proper LIN communication.

Symptoms

  • LIN slave devices not responding
  • Erratic LIN device behavior

Common causes

  • LIN ground wire open
  • Corroded ground connection
  • Broken ground splice

Diagnostic steps

  1. Check LIN ground continuity
  2. Inspect ground connection points
  3. Test for proper ground at LIN devices

Repair notes

Repair the open ground on the LIN bus circuit.

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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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