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It's been quite a while since I updated this post, but wanted to let you all know the final verdict. After replacing the ECM/TIPM and the engine, and (2) more thermostats, I still had problems with overheating. Shortly after installing the 4th thermostat, it seized up and the engine temp...

Thank you. I am going to research how to reset the ECM. I would love to save some money.

Also, thanks for info about ECO. I will check that out. I did disconnect battery when I took off alternator for water pump.

Not 100% if I got all air out. I didn't use OEM for sensors. Used the air bleeder on thermostat, then lifted front end up, engine running and topping off radiator. In between refills I revved up until I didn't see any bubbling. Suppose I can buy new OEM sensors and try that.

Hello JK Forum. I'm new to forum and I am original owner of my JK. The JK started overheating about a month ago, P0480 code- Cooling Fan 1 Circuit Control. Fan would accelerate once heated up. Also have a P0118- Eng. Coolant Sensor & P0113 IAC sensor. Mileage is at 201k. So I figured I'm do for...