P1170 – Fuel Rail Pressure Too High (Ford)

Description

P1170 Ford indicates the fuel rail pressure is higher than expected.

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Symptoms

  • High fuel consumption
  • Rough idle
  • Black smoke

Causes

  • Stuck regulator
  • Return blockage
  • PCM driver fault

Diagnosis

  • Measure fuel pressure
  • Inspect return line
  • Check regulator

Repair

  • Replace regulator
  • Repair return line