P1401 – DPFE Sensor Circuit High Input (Ford)

Description

P1401 Ford indicates the DPFE sensor is reporting a voltage higher than expected during EGR flow monitoring.

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Symptoms

  • Rough idle
  • Pinging
  • Poor acceleration

Causes

  • Failed DPFE sensor
  • Restricted EGR tube
  • Wiring short

Diagnosis

  • Check DPFE voltage
  • Inspect EGR tube
  • Test EGR valve

Repair

  • Replace DPFE sensor
  • Repair wiring
  • Clean EGR tube

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