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Home >> Infiniti >> 2001 >> G20 Base, Automatic, RE4F03W >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P1126: Thermostat Function >> DTC Confirmation Test

DTC Confirmation Test

Malfunction is detected when engine coolant temperature has not increased to normal operating temperature within a certain amount of engine run time. Possible causes are:

To set DTC, replace thermostat with an OEM thermostat. Turn ignition on. Using scan tool, select DATA MONITOR, and read COOLAN TEMP/S value. If value is more than 140°F (60°C), allow engine to cool until value is less than 140°F (60°C). Drive vehicle at 50-75 MPH for 10 consecutive minutes.

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