P1027 – Fuel Pump A Control Module Undercurrent (Ford)

Description

P1027 Ford indicates the fuel pump control module detected an undercurrent condition.

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Symptoms

  • Hesitation
  • Low power
  • Hard starting

Causes

  • Weak pump
  • High wiring resistance
  • Faulty FPDM

Diagnosis

  • Measure pump current
  • Inspect wiring
  • Test FPDM

Repair

  • Replace pump
  • Repair wiring
  • Replace FPDM