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Home >> Infiniti >> 2003 >> FX45 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0127: Intake Air Temperature Too High >> DTC Confirmation Test
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DTC Confirmation Test

  1. Wait until engine coolant temperature is less than 194°F (90°C).
  2. Turn ignition on. Select DATA MONITOR mode. Check engine coolant temperature. If engine coolant temperature is not less than 194°F (90°C), turn ignition off and cool down engine.
  3. Perform the next step before engine coolant temperature is above 194°F (90°C).
  4. Turn ignition switch on. Select DATA MONITOR mode. Start engine. Hold vehicle speed at more than 43 MPH for 100 consecutive seconds. If 1st trip DTC is detected, go to DIAGNOSTIC PROCEDURE  . If 1st trip DTC is not detected, system is okay at this time.
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