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DTC P0112: Intake Air Temperature (IAT) Circuit Low Input

  1. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Select IAT parameter. If display reads 246°F (119°C), go to next step. If display reading is not 246°F (119°C), check for an intermittent problem. Go to INTERMITTENTS in TROUBLE SHOOTING - NO CODES article.
  2. Turn ignition off. Disconnect IAT sensor harness connector located next to air cleaner housing. Turn ignition on. If display reading on scan tool changes to -40°F (-40°C), replace IAT sensor. If display reading is not -40°F (-40°C), check Gray/Red wire (Esteem) or Gray wire (Swift) for short to ground. If wiring is okay, replace PCM. Retest system.
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