P1118 – ECT Sensor High Input (Ford)

Description

P1118 Ford indicates the coolant temperature sensor signal is higher than expected.

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Symptoms

  • Overheating warning
  • Poor performance
  • High fuel consumption

Causes

  • Short to power
  • Faulty sensor
  • PCM driver fault

Diagnosis

  • Check wiring for shorts
  • Test sensor resistance
  • Scan ECT data

Repair

  • Repair wiring
  • Replace sensor