P0111 – IAT Sensor Range/Performance

Description

The ECM detects an IAT signal outside expected range.

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Symptoms

  • Poor fuel economy
  • Hesitation
  • Rough idle

Causes

  • Faulty IAT sensor
  • Air leaks
  • Wiring issues

Diagnosis

  • Monitor IAT data
  • Inspect intake
  • Check wiring

Repair

  • Replace IAT sensor
  • Fix leaks
  • Repair wiring