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2018 FORD F-150
5.0L V8 Coyote•RWD•AUTOMATIC•gas
19 active safety recalls on this vehicle — view recalls
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Repairs420Labor1001Torque8720Fluid18DTC2308Battery2Maintenance0Recalls19
P1237high severityPowertrain

Fuel Pump Secondary Circuit Malfunction

on 2018 Ford F-150 5.0L V8 Coyote · RWD

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

  1. Check fuel pump relay
  2. Inspect FPDM and wiring
  3. Test fuel pump directly with power
  4. Check fuel pressure at rail

Repair notes

Replace FPDM or fuel pump as needed. Repair corroded wiring.

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