P1237high severityPowertrain
Fuel Pump Secondary Circuit Malfunction
on 2021 Ford Bronco 2.3L I4 EcoBoost · 4WD
What this code means
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.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1