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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.
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1996 1997 1998 1999 2000 2001 Toyota Camry, 4 cylinders, 5S-FE, 2.2 Liter 2000 Camry. Friend informed me the car is running fine and not overheating. A code P0128 (Coolant Temperature below regulating temperature) may mean that one or more of the following has happened: -Low engine coolant level -Leaking or stuck open thermostat -Faulty cooling fan (running too much) -Bad Engine Coolant Temperature Sensor The information contained in this video is for general guidance, not responsible for any errors or injuries that you have done. Please subscribe and thank you for watching. Follow me on TWITTER: @88bmyvegas and http://lasvegasautoinsider.blogspot.com/
Engine Coolant Temperature Sensor Resistance Checking 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.
On this installment, Justin Le walks you through the diagnosis of a P0128(coolant temperature below thermostat regulating temperature). Here we verify the proper operation of the ECT before condemning the thermostat. Be sure to reinstall your thermostat in the right direction!
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What to check when P0128 Code comes on