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Home >> Buick >> 2008 >> Allure CXL >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Control System & Fuel System - 3.6L - DTC P0008 To DTC P0333) >> DTC P0125 or P0128 >> Diagnostic Aids

Diagnostic Aids

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The following table illustrates the ECM connector locations:

ECM Connector Location
X2 X1
Front of Vehicle

An engine that soaks for about 8 hours will help diagnosis the condition. After the cold soak, operate the vehicle at highway speeds for 20 minutes while monitoring the Calculated ECT-Thermostat parameter with a scan tool. If there is a condition, the calculated temperature will be 10°C (18°F) greater than the actual engine coolant temperature.

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