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Home >> Saturn >> 1998 >> SL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Diagnostic Trouble Codes >> DTC P0113 - IAT Sensor Circuit Temperature Out Of Range - High >> Diagnostic Procedures

Diagnostic Procedures

  1. Turn ignition on. Connect scan tool and monitor IAT sensor reading. If IAT reading is not greater than 257°F (125°C), problem is intermittent. See DIAGNOSTIC AIDS. If IAT sensor reading is greater than 257°F (125°C), go to next step.
  2. Disconnect IAT sensor harness connector. If IAT reading is less than -22°F (-30°C), replace IAT sensor. If IAT reading is not less than -22°F (-30°C), go to next step.
  3. Turn ignition off. Disconnect PCM harness connector. Turn ignition on. If IAT reading is less than -22°F (-30°C), check for IAT signal circuit for short to chassis ground or short to IAT ground circuit. If IAT reading is not less than -22°F (-30°C), replace PCM.
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