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2005-2011 AUDI A6
4.2L V8•AWD•AUTOMATIC•gas
5 active safety recalls on this vehicle — view recalls
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Repairs0Labor504Torque2218Fluid10DTC1115Battery1Maintenance0Recalls5
P1502high severityPowertrain

Fuel Pump Relay Circuit Short to Ground

on 2005-2011 Audi A6 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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🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
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