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Home >> Chevrolet >> 2018 >> Suburban 3500 HD LT >> Repair and Diagnosis >> External Pages >> Different car >> Section 2 (Engine Controls And Fuel - 5.3L (L83) Or 6.2L (L86) - DTC P0010 To DTC P0442) >> Diagnostic Information And Procedures >> DTC P0128: Engine Coolant Temperature (ECT) Below Thermostat Regulating Temperature >> Diagnostic Aids

Diagnostic Aids

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The parameters for intake air temperature and engine coolant temperature should be within 3°C (5°F) of each other if the ignition has been Off for greater than 8 h.

High resistance in the circuits of the component may set DTC P0128 without setting the DTC for the component :

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