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Home >> GMC >> 1997 >> Forward Control 4.3 W, L35, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 60 (Engine Controls - Tests W/Codes - 5.7L (G Series)) >> Diagnostic Trouble Codes >> DTC P0125 - ECT Excessive Time To Closed Loop >> Circuit Description

Circuit Description

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While engine is warming, VCM monitors ECT sensor to determine the amount of time it takes engine to reach coolant temperature required for closed loop operation. Test will not be run if either intake air or engine coolant temperature are less than predetermined temperature. VCM will only run test on a cold start and only once per cold start.

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