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Unread 10-05-2013, 10:57 AM   #1
Cdy291
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2001 WJ 
 
Join Date: Feb 2012
Location: Dallas, GA - Georgia
Posts: 140
Overheating and limp mode

Here's the details. 2001 WJ with the 4.0. Aftering driving about 15 minutes it heats up to around 240 degrees, according to my code reader. I assumed it to be correct because the engine seemed hot. I replaced to thermostat and cap, seemed like that fixed it, but didn't. Then I seem a bunch of coolant running out of the bottom of the radiator one day. So then I replace the radiator and water pump. I drove the on short 3 mile trips for a week after this with my code reader plugged in, never seemed to go above 203. Thought all was good till last night. I drove it about 20 minutes and the transmission went into limp mode, just like it did before when it got hot. I made it back home and plugged in my code reader and after it had been sitting a few minutes it still said 223 degrees, so I would say it made it to 240 at some point. Oil and coolant look clean and I don't know what else to replace at this point. Should I through a new temp sensor at it? It seems when the radiator heats up it also heats up the transmission fluid, then the transmission wont go into overdrive, at least thats what it appears.

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Unread 10-05-2013, 11:43 AM   #2
brouwmat
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2002 WJ 
 
Join Date: Nov 2006
Location: Sioux Falls, South Dakota
Posts: 1,022
Do you have a tow package? If so, is your eFan working? Common issue with the 4.0. If not that I might suspect air in the system.
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Unread 10-05-2013, 04:28 PM   #3
Cdy291
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2001 WJ 
 
Join Date: Feb 2012
Location: Dallas, GA - Georgia
Posts: 140
No tow package, and e fan is spinning.
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