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P0118 code after Water pump/T stat replacement

rodrc137

New Member
First Name
Charles
Joined
Jul 27, 2026
Threads
2
Messages
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Location
CT
Vehicle(s)
2018 jeep JL
Morning all. Hope im in the right section as Im new here. I am new to jeeps as my wifes jeep is a 2018 JL that I am currently working on. I just changed out the water pump and thermostat as they had small leaks. After the replacement I filled the reservoira and seemed to have bled all the air out and now i have a P0118 code which put the fan on high after startup. I checked the old sensor as that one was fine. That didnt clear the code. Has anyone ever run into this?
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