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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Control System Self-Diagnostics - 5.7L) >> Diagnostic Tests >> DTC P0128: Engine Coolant Temperature Excessive Time To Reach Operating Temperature >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different variant/trim than selected.

DTC P0128 is designed to detect skewed ECT sensor or engine thermostat that does not operate properly. Excessive flow through by-pass hose to throttle body may cause this DTC to set. A skewed IAT sensor can also cause this DTC to set. Check that IAT sensor reads near ambient temperature with engine running.

If problem is intermittent, see INTERMITTENT TROUBLE CODE DETERMINATION  under SELF-DIAGNOSTIC SYSTEM.

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