Fuel Pump Relay Circuit Short to Ground
1997-2003 Audi A8 4.2L V8 🇨🇦
Description
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
- Test relay control circuit for ground shorts
- Inspect wiring insulation
- Check relay socket for corrosion
- Test relay coil resistance
- Check ECU driver output
Repair Notes
Repair the shorted wiring or replace the fuel pump relay.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1502 on Other Vehicles
Common Questions
What does code P1502 mean on a 1997-2003 Audi A8?
P1502 stands for "Fuel Pump Relay Circuit Short to Ground". 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.
What are the symptoms of P1502 on a Audi A8?
Common symptoms of P1502 include: Check Engine Light, Fuel pump may not shut off, Possible no-start if circuit is open, Intermittent fuel pump operation.
What causes P1502 on a 1997-2003 Audi A8?
Common causes of P1502 include: Wiring shorted to ground, Faulty fuel pump relay, Damaged relay connector, Water intrusion in relay box, ECU driver fault.