When the thermostat doesn’t bring the engine up to the proper operating temp, it means that the coolant going through the heater core isn’t as hot. Lack of heat– The most prominent symptom of the P0128 trouble code in the Chevy Equinox is the lack of heat.Other symptoms may include poor engine performance and a decrease in fuel economy. The most common symptom of a P0128 trouble code in a Chevy Equinox is an illuminated malfunction indicator lamp (MIL).
#2005 CHEVY EQUINOX COOLANT THERMOSTAT DRIVER#
When the ECM detects that the engine’s coolant is not reaching its proper operating temperature within a set timeframe, it will trigger this P0128 trouble code to alert the driver of a potential issue. Below Thermostat Regulating TempĪs part of your Equinox’s computer system, your Engine Control Module (ECM) tracks various engine conditions, such as air temperature, engine speed and load, coolant temperature, etc. P0128 indicates an issue with the engine’s coolant temperature not reaching the proper operating temperature within a certain amount of time. The coolant temp sensor is responsible for telling the Engine Control Module (ECM) the engine’s coolant temperature. The P0128 OBD-II trouble code is a generic powertrain diagnostic code (it has the same meaning for the Chevy Equinox as any other vehicle). P0128 Definition: Coolant Temp – Below Thermostat Regulating Temp
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