We recently bought a 2012 Hyundai Tucson that was a lease return. I noticed that, after driving for several miles, and usually only at steady speeds above 40 mph (neither accelerating nor decelerating), the car engine revs up on its own, quite loudly and noticeably with a "racing" sound. This only lasts a few seconds and then goes back to normal. It's difficult to tell since it happens so quickly, but it seems as though the vehicle speeds up slightly when this happens. I know my heart does!
We took it in to the dealer. No code is thrown when it does this so they were not able to detect anything. I think both husband and techs thought I was imagining things.
After happening multiple times in one trip, I brought it back a few weeks later and one of the techs took the car home for a week. Quick trips through town didn't cause the unintended revving for him; however, a trip out of town on the highway did, several times. Still, no code was thrown.
They have contacted Hyundai corporate but have yet to hear back (a month now). We have not been driving it in that time since.
I have read that there is sometimes a problem with the throttle position sensor on all models of Hyundai, which causes varying degrees of unintended acceleration. We asked about this but were told it couldn't be. I have not pressed the issue, but they won't replace the throttle position sensor without a code since the car is under warranty. Feeling the situation is unsafe, I'd prefer to pay the money for the part and pay for the labor just to be sure but have not brought this up yet. The dealership's only suggestion is that it could be the transmission, but they don't know how/why without codes and so can't fix anything.
Now the dealership is suggesting we drive it until it throws a code (but why would it if it hasn't yet?) Or if a dash light comes on (so far, no dash light). My husband will be doing this next week, but if no dash light happens and no code is thrown, what then? Drive it until it drives us off a cliff?
Other ideas would be appreciated. Thanks!
have the same problem?
Tuesday, January 13th, 2015 AT 11:18 PM