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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System Self-Diagnostics - 3.8L >> Diagnostic Tests >> DTC P0128: Engine Coolant Temperature Excessive Time To Reach Operating Temperature >> Diagnostic Aids

Diagnostic Aids

DTC P0128 will set if diagnostic does not pass within 25 minutes after start up. DTC is designed to detect a faulty thermostat. A skewed ECT sensor to can cause DTC P0128 to set. A skewed IAT sensor may cause this DTC to set. IAT sensor should read near ambient temperature.

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

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