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2000-2003 AUDI S6
4.2L V8•AWD•AUTOMATIC•gas•ANK
2 active safety recalls on this vehicle — view recalls
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Repairs0Labor487Torque3151Fluid7DTC939Battery1Maintenance0Recalls2
P1502high severityPowertrain

Fuel Pump Relay Circuit Short to Ground

on 2000-2003 Audi S6 4.2L V8 · AWD

What this code means

The ECU detected a short to ground in the fuel pump relay control circuit. The relay may be stuck in the on position or not responding to ECU commands.

Symptoms

  • Check Engine Light
  • Fuel pump may not shut off
  • Possible no-start if circuit is open
  • Intermittent fuel pump operation

Common causes

  • Wiring shorted to ground
  • Faulty fuel pump relay
  • Damaged relay connector
  • Water intrusion in relay box
  • ECU driver fault

Diagnostic steps

  1. Test relay control circuit for ground shorts
  2. Inspect wiring insulation
  3. Check relay socket for corrosion
  4. Test relay coil resistance
  5. Check ECU driver output

Repair notes

Repair the shorted wiring or replace the fuel pump relay.

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