P1021 – Fuel Pump Secondary Circuit Low (Ford)

Description

P1021 Ford indicates the secondary fuel pump circuit signal is lower than expected.

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Symptoms

  • Lean running
  • Hesitation
  • Low power

Causes

  • Short to ground
  • Weak pump
  • Faulty FPDM

Diagnosis

  • Check wiring for shorts
  • Measure pump voltage
  • Inspect FPDM

Repair

  • Repair wiring
  • Replace pump
  • Replace FPDM