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2000 AUDI A6
2.8L V6•AWD•AUTOMATIC•gas•ACK
4 active safety recalls on this vehicle — view recalls
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Repairs0Labor501Torque2210Fluid9DTC900Battery1Maintenance0Recalls4
P2504critical severityPowertrain

Charging System Voltage High

on 2000 Audi A6 2.8L V6 · AWD

What this code means

Charging system output voltage exceeds maximum safe threshold.

Symptoms

  • Battery boiling/swelling
  • Bulbs burning out frequently
  • Check engine light
  • Electrical component damage

Common causes

  • Failed voltage regulator
  • ECM charging control fault
  • Ground strap issue

Diagnostic steps

  1. Measure charging voltage at various RPM
  2. Check voltage regulator
  3. Inspect ground straps

Repair notes

Replace alternator or voltage regulator. Check and repair grounds. Overcharging can damage expensive electronics.

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