Question about 2006 Hyundai Santa Fe

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2006 Hyundai Santa Fe

It seems that all my car problems only happen occassionaly, and of course they never can duplicate them when the cars in the shop.....this is my most recent.

I have a 2006 Hyundai Santa Fe with 24,000 miles.

The problem is that it downshifts at inappropriate times.

For example.....I was driving on the highway going about 60, there was slower traffic up ahead so I took my foot off the gas to let it slow down on it's own.

About 5 seconds after I took my foot off, it downshifted, I was still going around 55 and 60 mph.

After it downshifted a couple of seconds later it went back up into 4th gear without me pushing on the gas pedal.

It will also do it sometimes in other gears, but isn't as noticiable.

I've had it in the shop and told the dealer what's going on. They've told me both times they couldn't duplicate the problem, and have reset the computer both times. That seems to help for awhile, but then it'll start doing it again.

And of course it seems to do it in spurts. For the last week it hasn't done it at all.

What do ya think?

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  • 2 more comments 
  • rdahoffman Sep 23, 2008

    All I think they did was check the computer to see if there were any errors showing. If they did take it for a road test to try and duplicate the problem, I'm sure that they only rode it around the block since they only put a mile on it between the time I dropped it off, and when I picked it up.



    I won't sit here and b.s. you......I'm not a mechanic, and I have no idea what a "tps", or "w.o.t." is, but I do THANK YOU for taking the time and trouble and giving an answer.



    I did check and see if there were any service bulletins or recalls which came close to "the problem", but I struck out there too.



    Once again, Thanks.



    Rick

  • rdahoffman Sep 25, 2008

    Jimmy;



    Once again, thank you for the information.



    I'll be taking it to the dealership this week for service, and once again I'll tell them about the problem.



    I'll let them know what you said, and see what their response is, but somehow I get the impression, since I took it to two different dealerships and got the same response (they couldn't duplicate the problem and they reset the computer).....if something dosen't show up as an error on the computer.....it's beyound their capability to fix it.



    Oh, one more thing.....if you don't mind......



    I've also noticed that "at times" when I pull up to a stoplight, that the engine will go down to 500 rpm's, instead of the 7 or 8 hundered that it usually registers at. I can go to the next light and when I stop it'll go back to the 7-800, or it might stay at 500 for the next couple of lights. I probably wouldn't even have noticed it , but sometimes when I'm stopped and it's sitting at 500, it'll jump up to the 7-800 where it's supposed to be at.....if that happens, and I have my foot sitting light on the brake, it'll make the car jump forward a little bit, and when you're not expecting it, you think someone came up and bumped the rear of the car.



    Could that be caused by the same thing that you described?



    Once again.....Thank you for the time and trouble it took to answer.



  • rdahoffman Sep 27, 2008

    Jimmy;



    Since you were so considerate I thought that I'd let you know what happened when I took my vehicle to the shop today.



    Once again I described the specific problem to them and gave them the same examples that I posted earlier.



    I also asked them if the problem could be with the throttle position sensor.



    They had the car for 6 hours, and called and said.....ya wanna guess :-)



    The computer didn't show any errors, and the mechanic couldn't duplicate the problem.



    They also told me that the mechanic had drive a whole 5 miles trying to duplicate it.....(wow, a whole 5 miles.....sometimes ya have to wonder.....you tell them that the problem is intermitent and hasn't done it in a week.....but somehow driving it a whole "5 miles" is gonna make it show up, heck it was hardly enough to get the thing warmed up)



    Well, I've still got a few more years on the warranty.....if I complain everytime I go for an oil change or have some other work done......maybe it'll act up.



    I think the next time I take it I'm gonna ask them......"Just being nosy.....If the mechanic was driving the car, and it did do what I was saying, and he came back and the computer didn't show any errors.....what exactly would you do?"



    BTW.....and if anyone else has a Hyundai.....if you go to the Hyundai site and sign up, they'll provide you with all the tech. service bulletins for you vehicle, and unlike some sites, they don't charge you to read them. That's what I did, and none of the t.s.b.'s delt with my specific problem.



    Once again thanks.

  • skedra Dec 01, 2008

    i have a 2002 santa fe and when i drive it for about 30min or 40km 20 some miles on the highway and get off coming to a light with my foot on the brake the transmission seems like it is shifting from neutral to 1st causing a bump like if someone bumped you from behind. i took it to the dealer only to find out that they can not find anything on the comp. ... duuhhh sure if a check engine light came on i would too know that there is something wrong.. therefore they could not duplicate it oh yeah and they mechanic took it for a drive after i left the car there for the whole day and still had to wait an hour. i think that when they took it for a drive.. around the block after i was specific in telling them that a 30min drive makes that happen... i'm gonna take it back during chirstmas as i spoke with the service manager so i will drive it around the block for 30 min and than call them that i coming in hopes that he can get a mechanic out in time to sit in the car to feel this bumping noise.

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Did they lab scope the tps for intermiten week spots ??? it could have a open spot on the tps and the computer thinks its "idling" or "w.o.t" causing the wierd shifting. hope this helps...... jimmy

Posted on Sep 23, 2008

  • Jimmy
    Jimmy Sep 23, 2008

    • Throttle Position Sensor - tps

    wide open throttle- w.o.t

    sorry bout that....... hope this helps

  • Jimmy
    Jimmy Sep 25, 2008

    there are 11 tsb's for this transmission. all for shifting problems, one has a relearn for the tps. here they are........ 07-40-010 08-at-003 07-40-009 07-40-009-01 05-40-016 06-40-013 06-40-016 07-40-007 06-40-011 07-40-006 these are the TECHNICAL SERVICE BULLETINS for the transmissoin. they might be tryin to get you past the warranty date. good luck jimmy

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