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1997 AUDI A4
2.8L V6•AWD•AUTOMATIC•gas
8 active safety recalls on this vehicle — view recalls
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Repairs0Labor509Torque3238Fluid9DTC859Battery1Maintenance0Recalls8
U0305high severityNetwork

Software Incompatibility with ABS Control Module

on 1997 Audi A4 2.8L V6 · AWD

What this code means

Data incompatibility between the ABS module and other vehicle control modules.

Symptoms

  • ABS light on
  • Stability control disabled
  • Brake assist not working
  • Traction control off

Common causes

  • ABS module software outdated
  • Software mismatch after partial update
  • Wrong ABS calibration installed

Diagnostic steps

  1. Check ABS module software version
  2. Compare software compatibility with ECM
  3. Reprogram ABS module
  4. Check for TSBs

Repair notes

Reprogram ABS module with correct software revision. Must be compatible with other chassis modules.

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