P1641
Fuel Pump Primary Circuit Failure
2002-2005 Ford Explorer 4.6L V8 🇨🇦
High SeverityPowertrain
Description
The fuel pump primary circuit has an electrical failure. The PCM cannot properly control the fuel pump relay or the circuit to the fuel pump.
Symptoms
- Check Engine Light
- Engine may not start
- Engine stalls
- Loss of fuel pressure
Common Causes
- Faulty fuel pump relay
- Blown fuel pump fuse
- Wiring issue in fuel pump circuit
- Failed fuel pump
- Corroded connector
Diagnostic Steps
- Check fuel pump fuse and relay
- Test for power at fuel pump connector
- Check fuel pump relay operation
- Test fuel pump directly with battery power
- Inspect wiring for damage
Repair Notes
Replace fuel pump relay or fuse. Repair wiring. Replace fuel pump if failed.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0001Fuel Volume Regulator Control Circuit/Open
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0003Fuel Volume Regulator Control Circuit Low
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
P1641 on Other Vehicles
Common Questions
What does code P1641 mean on a 2002-2005 Ford Explorer?
P1641 stands for "Fuel Pump Primary Circuit Failure". The fuel pump primary circuit has an electrical failure. The PCM cannot properly control the fuel pump relay or the circuit to the fuel pump.
What are the symptoms of P1641 on a Ford Explorer?
Common symptoms of P1641 include: Check Engine Light, Engine may not start, Engine stalls, Loss of fuel pressure.
What causes P1641 on a 2002-2005 Ford Explorer?
Common causes of P1641 include: Faulty fuel pump relay, Blown fuel pump fuse, Wiring issue in fuel pump circuit, Failed fuel pump, Corroded connector.