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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 26 (Engine Controls Self-Diagnostics - 5.0L & 5.7L) >> Diagnostic Tests >> DTC P0128: ECT Less Than Thermostat Regulating Temperature >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2001 GMC Savana, 2001 Chevrolet RV Cutaway, 2001 Chevrolet Cutaway, and 2001 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0128 is designed to detect a faulty thermostat. A skewed ECT sensor may cause a P0128 to set.

A skewed Intake Air Temperature (IAT) sensor may cause this DTC to set. IAT sensor should read about ambient temperature with engine running.

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