Its possible that your problem also stay in the Engine Coolant Temperature (ECT) sensor resistance changes in
response to engine coolant temperature.
Keep in mindthat the sensor resistance decreases
as coolant temperature increases. This provides a reference signal,
which indicates engine coolant temperature, to the ECM.
Fig.: Compare the sensor readings with these values
Fig.: Location of the thermal sending unit (A) next to the coolant temperature sensor (B)
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Hi,
The fan, radiator, liquid and coolant pump are other issues that need to check.
Regards
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