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Cooling fans are most likely not coming on. I believe that vehicle has two fans..side by side, one closer to passenger side is ac fan..should come on when you cut ac on. I would check coolant level some sensors will not read temp correctly unless submerged in coolant...fans should kick on when car reaches somewhere around 185 to 205....should be a plastic fuse box under hood that houses fan relay...also should be identical relays that run headlights or something else..you can swap relaysaround to see if the relay has gone bad. If fans aren't coming on or one of the two is..turn the one not coming on by hand to see if fan motor has frozen up
You would need a scanner and an inferred temp sensor to troubleshoot the system. You need to know what the actual engine temp is, and what the temp sensor is telling the computer. If and when the engine reaches 220 degrees, the engine temp sensor should be sending that data to the computer and it should ground the fan relay to activate it. Unplugging the sensor and having the fan run tells you the sensor is connected, and there should have been a trouble code set at that time. It is possible the coolant level is low, or something else preventing the temp sensor sending the correct data.
the "sensor " near the thermostat should have 2 ,3 or 4 wires to it
if it only has one wire , that is the temp gauge sender unit and not the coolant sensor the coolant temp sensor reports to the ecm and that unit then switches on the fan relay that spins the fan
if you unplug the coolant sensor and the fan starts to run you have a serious coolant temp sensor circuit problem
take it to an accredited service center and have it sorted
If you unplug the coolant temp sensor the computer will turn on the fans because it doesn't know how warm the engine is. The computer is working like it is suppose to. I think you might have a bad coolant temp sender. If it was a problem with the fans or the relays, they wouldn't come on when you unplug the sensor, because the problem would still be there.
Check out coolant temp sensor ,its wiring and condition of coolant all together they control that circuit.
Then make sure ECU is getting Temp sensor signal and is sending it to the relay accordingly. ( which in your case is probably not the problem because the fans went on when you removed and accidently grounded coolant sensor wiring) Only one thing left Good luck
Definately have a sensor problem...but that may not be all. You can blame the sensor issue on the idling problem. The overheating in park is likely one of 2 things, provided you have adequate coolant. #1 a sticking thermostat or a bad coolant temp sensor not activating your fan at idle. What you should do is have your diagnostic codes read in order to take care of the sensor issue. Most national parts chains such as Auto Zone or Advance will do this at no charge in hopes of selling you a sensor. Good Luck! I hope you find this to be very helpful.
if i disconect temp sensor fans come on cool engine but then no temp gauge
That's what I'd expect after unplugging.
This is sounding like a bad coolant temp sensor. Test it or replace it before you do anything else. Read this post on how to test an engine coolant temperature sensor
Do this test with the key in run but engine off unplug the ECT (engine coolant temp.) sensor, if the fans turn on (does this by default) the system is ok, if not then check the Fan relay. Also look for burning of the electrical connections to the cooling fans.
the cooling fans are run by a relay it's located in the junction box. check this. there is also a thermoatic sensor located near the fans next to radiator. the fans should free spin when the engine is off this is a good indiacator that it's not the fan themselves. if the relay checks out(run engine and switch the fan relay with the a/c clutch relay when the engine reaches 180 degrees you will feel the upper radiator hose get hot the fans will turn on a short time later iof they don't it's the temp sensor near the radiator if they do it's a bad relay...please rate this thanks