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Home >> Infiniti >> 2000 >> I30 Base, RE4F04W >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P1126: Thermostat Function >> DTC Confirmation Test
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DTC Confirmation Test

NOTE: For best results, perform test with ambient temperature at 14°F (-10°C) or more and engine coolant temperature 14-140°F (-10-60°C).

Malfunction is detected when engine coolant temperature does not reach a specified temperature, even though engine has been running for a specified time. Possible causes are:

To set DTC, replace thermostat using an OEM thermostat. Turn ignition on. Select DATA MONITOR with scan tool and observe engine coolant temperature. Ensure engine coolant temperature is less than 140°F (60°C). Drive vehicle at 50-75 MPH for 10 consecutive minutes.

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