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  #1  
Old 02-16-2015, 10:31 PM
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2007 WK 3.7 temperature issues

Hey guys, I have an 07 wk 3.7 and it has been runnin pretty cold.. The temperature gauge doesn't go all the way to the middle and sometimes it will go up a dip or two then go dead cold and the engine light comes on and another red light with a lightning in between two bars. Is it just my thermostat? Because today it was all the way in the cold position and the fans were on...

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Old 02-17-2015, 08:35 AM
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Re: 2007 WK 3.7 temperature issues

The fact that the cooling fan(s) run with a cold engine, means that the PCM is not getting the engine coolant temperature information from the sensor. Could be a faulty sensor, dirty sensor connector or wire problem. I would first check the sensor connector.
Also you have the check engine light. The fault code which is set is most probably regarding the coolant sensor circuit. (P0115)
Attached the sensor location, its item #3.
The cabin heating is still working ok?
Attached Files
File Type: pdf 3.7L coolant sensor.pdf (242.0 KB, 1 views)
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Old 02-17-2015, 08:46 AM
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Originally Posted by Frango100 View Post
The fact that the cooling fan(s) run with a cold engine, means that the PCM is not getting the engine coolant temperature information from the sensor. Could be a faulty sensor, dirty sensor connector or wire problem. I would first check the sensor connector.
Also you have the check engine light. The fault code which is set is most probably regarding the coolant sensor circuit. (P0115)
Attached the sensor location, its item #3.
The cabin heating is still working ok?
I fully agree. I had a Coolant temp sensor go bad. Temp gauge completely quit working
It's very easy to swap out for a new one tho
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Old 02-17-2015, 11:36 AM
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Re: 2007 WK 3.7 temperature issues

Wow thanks a lot! The heater works but when the temp drops all the way down it gets warm-ish

---------- Post added at 04:29 PM ---------- Previous post was at 04:15 PM ----------

That's why I though it was the thermostat maybe stuck open

---------- Post added at 04:36 PM ---------- Previous post was at 04:29 PM ----------

Also forgot to mention couple years ago when I bought it they changed the thermostat, maybe the wrong temperature one?
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Old 02-17-2015, 11:55 AM
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Re: 2007 WK 3.7 temperature issues

So first get the fault code read out. If it says that it takes too long to heat up the engine, then for sure the thermostat is the culprit. But because you mentioned that the cooling fan was on with the engine cold, it seemed to be a problem with the temperature sensor.
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Old 02-17-2015, 12:03 PM
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Re: 2007 WK 3.7 temperature issues

Ahh ok, I will get the reading thanks again!
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Old 02-17-2015, 02:07 PM
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Re: 2007 WK 3.7 temperature issues

So today I cleaned the temperature sensor and after driving about 30 min on the highway the temperature stayed at the top of C. Right about the second point
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Old 02-17-2015, 02:12 PM
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Originally Posted by delarissadacosta View Post
So today I cleaned the temperature sensor and after driving about 30 min on the highway the temperature stayed at the top of C. Right about the second point
A little on the cold side, I'd venture say the tstat is probably partially stuck open
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Old 02-17-2015, 02:13 PM
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Re: 2007 WK 3.7 temperature issues

Yeah that's what I'm thinking, might as well change it they r cheap
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Old 02-17-2015, 02:16 PM
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Originally Posted by delarissadacosta View Post
Yeah that's what I'm thinking, might as well change it they r cheap
They are. Might as well flush the coolant while your at it, since the whole thing has to be drained
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Old 02-17-2015, 02:18 PM
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Re: 2007 WK 3.7 temperature issues

Yeah my coolant doesn't look that pretty either
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Old 02-20-2015, 08:20 PM
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Re: 2007 WK 3.7 temperature issues

It was the thermostat! Thanks for the help!
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