82 Like 9 Dislike
In this video Lauren explains how the coolant temperature sensor works. http://www.howstuffinmycarworks.com
Coolant Temp Sensor busted yesterday. Upon inspection the PCV valve was also clogged and I was 2 quarts low, Go figure.
Checking coolant level, verifying operation of the engine thermostat, verifying the fan is operating, and the control circuit for the fan
A P0128 is a code is an indication of a faulty thermostat or ECT (engine coolant temp sensor). The manufacture designs the engine to run at a specific operating temperature for the most efficient operation. The thermostat regulates the coolant between the engine and radiator. If the thermostat sticks open or is weak, the coolant does not get to desired temp level. If the thermostat sticks the the engine will overheat causing damage. We simply show a quick way to check proper thermostat operation.
GM 3100,3400,3500 Engine Coolant Temp Sensor Replacement Disclaimer: This video is not meant to be a definitive how to.Always consult a professional repair manual before starting your repair.I am not responsible for any problems that you might incur by watching or following this video.
Here is a quick and easy way to check temperature sensor. I could have done a lot of other checks, but i'll do them later if the sensor doesn't fix the problem. As far as sensor being bad, there is no doubt.