Sonata I45 (YF - 2011+) :: Downshifting From 4th To 3rd Right Around 35 Mph
Apr 22, 2014
Just picked up a 2012 GLS two weeks ago. So far I like the car. Unfortunately, I do about 40 miles a day of traffic driving. I have noticed the car seems to downshift from possibly 4th to 3rd right around 35mph. This downshift is noticeable and the engine has to rev to match the change. It is not a high rev, just a noticeable engine braking. Is this normal? I dont feel like anything is wrong just seems like the computers are not sure when to downshift.
When the car comes to a complete stop with your foot on the brake, does the car lower its rpm by 100-200pms? Seems like this is a gas saving technique. I have noticed it when While at a light and I lift my foot slighty the car feels like either the brakes are grabbing or the rpms are to low.
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I travel this interstate route often that is somewhat hilly. I always use cruise control. When I got my 2007 Sonata (I4) 4 speed A/T and traveled on this road I never noticed much down shifting. Later my daughter bought a 2010 Sonata (I4) 5 speed A/T, and on this road I noticed the Xmission downshifting sometimes. When I got my 2013 (I4) 6 speed A/T, I started noticing it more often downshifting. I'm sure thats since the final drive ratio is much higher in each successive car. When my wife is driving she doesn't notice but I can tell even from the passenger seat. I can stop the downshifting by putting it in manual mode. but I see the RPMs increase somewhat. I assume thats from the TC lockup disengaging and the CC trying to maintain speed if a long hill. I suppose if the hill was long enough and steep enough that I would eventually lose speed but that doesn't occur(very much). If that is more economically that letting it just go ahead and downshift. Am I the only one annoyed by this constant up/down shifting?
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I've been driving my wife's sonata to work this week and notice as I start to slow down at around 20MPH the car almost surges a little bit. Maybe I am not diagnosing it correctly but it's almost like it's downshifting rough.
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I'm having in not being able to downshift manually. I can shift up with no problem. I have 116,000 miles on my Sonata that I purchased new 8 years ago. I had the (4 cylinder) tranny flushed about 18,000 miles ago. No other issues.
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When coming to a quick stop the transmission has a shutter upon downshifting the shutters when you accelerate quick off of a stop light or stop sign. Also quick left hand turn hear a clunk coming from left side wheel. 2015 Sonata Sport 2.4L
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i drained the 30000 mile fluid two weeks ago because it was harsh downshifting when coming to a stop... I was curious if others noticed a lot of metal sludge sticking to the magnetized drain plug???..
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2009 Hyundai Sonata automatic: When downshifting from 4th to 3rd it feels like I hit a bump, or like I just hit the brakes hard for a second.
What could it be? It's most noticeable when the car is cold. I have 82k miles on it, so it's still in the "power train warranty".
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My daughter has a 2010 Sonata with a 4 cylinder and an automatic transmission. She is pretty frustrated with an intermittent problem. Every once in awhile, especially if the engine is cold, the car jerks while slowing down. She believes it is the transmission when it down shifts. I have driven the car and have not been able to duplicate the problem myself. The dealer recently changed the mapping for the transmission in hopes that would work but it hasn't. The dealer hasn't been able to duplicate the condition either.
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I have a 2003 VW Eurovan that had it's transmission rebuilt in 2011. In 2012, we were going up a steep mountain road approx. 25 mph and the van downshifted into first gear. We tried everything from speeding up to pulling over and letting it cool down to turning the engine off and on. It would only upshift into the correct gear when we reached the crest of the hill and started going downhill. As I live in San Diego, there are no hills high enough to reproduce this with city driving and so it never happened again until we went back to the same place this year and at almost the exact same spot on the road. We took a trip later in the year to Oregon where we encountered many uphill grades and each time we hit a steep part and going around 20-30 mph, the van would downshift again either into first or second gear, and each time upshifting when we started going downhill.
At the end of this last trip, a new whining noise appeared and is present everyday we drive and gets louder and higher pitched the faster we go. We have taken the van numerous times to the dealership who says there are no engine codes to suggest a problem and their last assessment was the downshifting may be an overheating problem and the whining noise was definitely from the transmission indicating a bearing problem and they suggested getting the transmission rebuilt again. The transmission shop states that the transmission is fine by the fact that the fluid is in good shape, the transmission is basically "dumb" and only does what the computer tells it to and therefore it is a computer problem and the whining noise, although new, is just a normal noise that all transmissions make. Each place points me in the direction of the other but neither has solved my problem.
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I have an 09 Sonata that jerks when automatically down shifting just before coming to a stop or slowing to make sharp turn. Car has 130k miles and I've never changed transmission fluid. BTW...it's been a GREAT car!
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First off I want to say I love my 11 f350 6.3 srw she's a awesome truck. I pull a small 7x14 trailer for my biz..
(3600-400) is the usually weight, I always use my tow feature. One day last week I start out hit my button in go, but I notice the engine braking/down shifting wasn't working. The trans still shifts smooth n normal the light is on the dash but no tow engage.
I check the transmission wire plug to make sure it'd getting a good connection, it does. I take the rubber boot off next to the shifter look at those wires they look ok not pinch or nothing, so I'm stumped.
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I just replaced my OEM battery with a duralast from autozone. The battery had 138,000 miles. Shortly after, the check engine light came on and code says P0106. Map Sensor. Seems like to much of coincidence that this happened. Have read that disconnecting battery cables for 3 hours may do the trick.
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THis is about the 5th or 6th time in the past year (2X in past 2 weeks) that the A/C will not come on. Two times took to Dealer & it worked just fine. Ir worked when I drove it, then parked it for 2 hours, and then it wouldn't work. Parked it, and then it worked fine again.
Dealer has no knowledge of this being an issue.
Similarly, my iPhone does not connect on an intermittent basis - again, always connects when at dealer.
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Should I do an Oil change? I never noticed this before. I have 5897 miles on the oil now.
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Sometimes when I put my AC on it makes a hum. It starts soft, gets louder and louder then fades away.. It's not all the time, one of those hard to diagnose intermittent noises..
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I dropped my Audi A4 for a 2011 Sonata. Hyundai has come a long ways.
I am having one problem with my car though. Both of my key fobs work for a few minutes after the car is turned off. Then they will not unlock the car. When I hit unlock the lights come on inside, but it does not unlock the doors. The lights come on with the fob regardless of how long it has been since I started the car. If I unlock the car with my keys the car alarm goes off and the engine is immobilized. I can then get out of the car, lock it with the key and unlock it again and it works. I can also start the car if I unlock the door and wait a couple of minutes before I attempt to start the car.
After this the key fobs work again for about two minutes after the car is turned off. The key fob batteries are new and the car has a brand new battery. The dealer replaced the central locking mechanism thinking that was the problem. It did not resolve the issue.
My car is a 2011 Sonata GLS with nav/dimesion. I have 55K miles on it and still have warranty.
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If the speedo shows me going 40MPH, my phone GPS and radar signs show me going 37-38MPH.
Is this something I should have the dealer correct or just roll with it? I've seen others post similar results, so wondering if ALL Sonatas do this?
OEM 18' wheels/tires.
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I have 90K and the SRS light came on a few months ago. What could be causing it?
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I bought my New Sonata in March 2012 and loved the Nav Bluetooth. I could say "call name" it would ask who and I would say a name from my contacts and it would connect no problem. One day a few months ago it just stopped working? I took it into the dealership and after 3 service members and the guy who sold my car to me couldn't get it to work they told me my Nav system needed to be replaced. I brought it back a few days later and left it for many hours. They called and said it was ready. I went to pick it up and they told me that it wasn't the Nav system that an "update" needed to happen? The service guy said that it should be a few weeks. Me knowing nothing about iPhones and Nav systems left confused. fast forward two months later it still isn't working! I also brought it in for an oil change a few weeks back and ask them if they have any update and they said no.
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I have a 2013 Hyundai Sonata GLS and my fog lights wont turn on with the HIDs installed but they turn on with my regular halogen bulbs? I installed HIDs on the low beam headlight and they work perfect with the computer warning and anti-flicker. when i installed the fog light HID kit on my fog lights, they just make a quick flicker for like 1 second then they turn off. I have switched ballast, reconnected wires, and thought of switching polarities. Haven't done that yet because power is reaching the bulb.
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I have owned and driven a 2011 Sonata for the past 9 months (12,000 kms). In the last two weeks the eco light on the dash has delayed coming on until the car has been driven for five minutes or so - usually around three kilometers. Once it comes on, it will function in the normal manner and will come on the moment the car moves even after it having been parked for a while. My thought is a sensor problem or a loose connection but I am not sure.
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