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Wont shift into overdrive

2001 Kia Sportage wont shift in to overdrive, i understand it has to warm up? replaced thermostat and single wire sending uint....still not warming up....???

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  • Contributor
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Yes, the 1997-2002 Kia Sportage DOES need to warm up (I think the engine must be around 122F or so).

This is caused by a routine built in to the ECU (Electronic Control Unit). The ECU sends a 12v signal to the TCU (Transmission Control Unit) when the engine is Cold (below appx 122F). The TCU, when it sees this voltage, waits longer to shift AND prevents the shift into overdrive.



Two ways to fix this:

-1. Figure out what is wrong with your cooling system. The engine should warm up within 10 min of driving or so. Sounds like your thermostat is stuck open. Make sure you did not install it backwards. The pellet (the brass part sticking out) should go towards the engine, NOT towards the radiator. The extra hole should go up towards the top.

--AND/OR--

-2. Cut the wire from the ECU to the TCU that engages this function. Find the TCU (6"x6" silver box, on its side, above the brake pedal). Unplug the connector (big black connector, 35 pins). You are looking for the white wire with a green stripe (pin 33) This is right next to the release button you have to press to release the connector. Cut this wire, leaving enough to splice it back together later in case you should decide you want this function back, tape the harness back up (with electrical tape), plug the connector back in, enjoy!



Hope this helps someone!

Posted on Jan 05, 2015

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  • Kia Master
  • 3,679 Answers

Does the heater blow hot air ? if not check the water pump is working also check the coolant level

Posted on Mar 25, 2014

  • Aatcman Jan 05, 2015

    Um, what does the heater have to do with anything?

  • steve Jan 05, 2015

    the heater is part of the engine coolant system , if it does not blow hot air then that is a sign that the cooling system may have a fault hence why i advised checking the water pump, thermostat etc may just have an air lock stopping the engine warming up

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SOURCE: 2001 Sportage Trailer wire connections

brown to the tail lights. yellow to left turn signal. green to right turn signal. this is a basic 3 wire hook-up i use all the time w/4wire connectors for all trailers. white wire is not used. ground is established when you hook to the ball.
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SOURCE: four wheel drive wont engage

I fought with this problem every year since I had the Sportage. And it was so frustrating to find out just when you really needed it, that you did not have 4-wheel drive. I replaced the hubs with manual hubs and I wish I would have done it at the beginning. They work great and are 100% reliable. Bottom line.. the vacuum hubs were a great idea that just plain did not work reliably. Save yourself alot of grief and money and just replace the hubs. Less than $200 including paying someone to put then on and I now can rely on my Sportage when I need it.

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Let the car warm up in the morning time i promise this works

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SOURCE: 1997 Chevy 1500 P/U 4x4 small V8. Transmission shifting issue.

you may be confusing the torque converter clutch engagement with o.d. this trans has a problem with the T.C.C. regulator valve wearing out the valve body bore. this will cause the converter clutch to engage only sometimes or not at all. this will set a P1870 code in the control module. when this code is stored in the controller, ( check engine light may or may not be on), it increases the pressure in the transmission causing the 1-2 shift to be harsh. ask a local tranny shop to scan the vehicle ( most will do this for free) if this is the problem they can either fix your valve body (sonnax parts) or replace it with an upgraded valve body. hope this helps

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1 Answer

How do i find out why my 2001 kia sportage not shifting to overdrive


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I had a simular problem.
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Let the car warm up in the morning time i promise this works

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