Fuel Pump Secondary Circuit Malfunction
2000-2006 Lincoln LS 3.0L V6 🇨🇦
Description
The fuel pump secondary circuit has a malfunction. The PCM has detected an issue with the return signal from the FPDM indicating the fuel pump is not operating as commanded.
Symptoms
- Engine cranks but will not start
- Engine stalls
- Intermittent no-start
- Loss of power
Common Causes
- Faulty FPDM
- Corroded fuel pump connector
- Failed fuel pump
- Wiring damage
- Blown fuel pump relay
Diagnostic Steps
- Check fuel pump relay
- Inspect FPDM and wiring
- Test fuel pump directly with power
- Check fuel pressure at rail
Repair Notes
Replace FPDM or fuel pump as needed. Repair corroded wiring.
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
P1237 on Other Vehicles
Lincoln Aviator
2003-2005 4.6L V8
Lincoln Aviator
2003-2005 4.6L V8 DOHC
Lincoln Aviator
2020-2024 3.0L Twin-Turbo V6
Lincoln Aviator
2020-2024 3.0L V6 Twin Turbo
Lincoln Aviator Grand Touring
2020-2024 3.0L Twin Turbo V6 PHEV
Lincoln Aviator Grand Touring
2020-2024 3.0L Twin-Turbo V6 Hybrid
Lincoln Aviator Grand Touring
2020-2024 3.0L V6 Twin Turbo Hybrid
Lincoln Blackwood
2002-2002 5.4L V8
Common Questions
What does code P1237 mean on a 2000-2006 Lincoln LS?
P1237 stands for "Fuel Pump Secondary Circuit Malfunction". The fuel pump secondary circuit has a malfunction. The PCM has detected an issue with the return signal from the FPDM indicating the fuel pump is not operating as commanded.
What are the symptoms of P1237 on a Lincoln LS?
Common symptoms of P1237 include: Engine cranks but will not start, Engine stalls, Intermittent no-start, Loss of power.
What causes P1237 on a 2000-2006 Lincoln LS?
Common causes of P1237 include: Faulty FPDM, Corroded fuel pump connector, Failed fuel pump, Wiring damage, Blown fuel pump relay.