Question about 2001 Hyundai Sonata

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My 2001 kia magentis v6 (same as hyundai sonata) sometimes get stuck at 3000 rpms and wont shift unless i put it in manual shift mode. i can get it to shift then but it still wont rev past 3000rpms. i brought it to a shop and they said it was going into safe mode due to high transmission tempature. although when this problem occurs i checked the trans fluid it was hot but i could still touch the dip stick with out being burned. whenever i disconect the battery for about 5 minutes and reconnect it the problem will go away for a bit then start happening again. im thinking bad sensor some one online had posted a similar problem saying it was a bad crank shaft sensor. then this morning the car was running fine i turned it off for a few minutes to go to a store when i went to start it back up it would turn over but wouldnt start. when i turned the key to the on position i could hear the fuel pump engage so i dont think it is that. when i disconected the battery for a few minutes and reconected it it started up and got me home. any ideas on what could be wrong or if these two problems are even related thanks

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Dear friend-when your vehicle wont rev it means that it went into limp mode and by disconnecting the battery you reset the ecu and will appear ok till the faulty sensor comes up again,have a dianostic test carried out to sole,previble when in limp mode.

Posted on Jul 22, 2009

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1993 hyundai sonata has check engine light on and is stuck in limp mode and wont shift out of second gear


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1 Answer

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I'm not sure about the system in your car, but this sounds like it may be stuck in "limp home" mode, where then engine detects a fault and limits the cars speed and rpms to protect the engine from any further damage. I suggest you check the throttle body and you can find instructions online that will tell you how to tell if it is in limp home mode, and possibly how to fix it yourself., Although if limp home mode did engage, there may be a more serious problem with the car, and i suggest you have a mechanic look at it.

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1 Answer

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2 Answers

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Hmmmmm...send it to the junk yard! Cost more to fix the transmission than the car is worth.

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