P1112 – IAT Sensor Intermittent High/Low (Ford)

Description

P1112 Ford indicates intermittent high/low switching in the IAT sensor circuit.

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Symptoms

  • Intermittent hesitation
  • Rough idle
  • Poor acceleration

Causes

  • Loose connector
  • Broken wiring
  • Failing sensor

Diagnosis

  • Wiggle-test wiring
  • Check connector tension
  • Measure IAT voltage

Repair

  • Repair wiring
  • Replace sensor