Sonata I45 (LF 2015+) :: Cruise Control Often Triggers Collision Warning
Apr 26, 2016
I have been using ACC a lot during my daily commute, it's really an effortless way to drive the car on a daily basis.
One of the issues I have been running into with it is that sometimes when the car in front (recognized by radar) accelerates and immediately decelerates to a quick stop my Sonata's ACC does not react and apply the brakes fast enough. The car will basically apply some braking power (~50%) while very quickly approaching the car in front, all the while triggering the rapid beeping of the Collision Detection system. Everytime this happens I have always had to manually intervene and apply the necessary braking power to stop short of hitting the car in front. This is pretty ridiculous to me since if the car KNOWS that it will crash without additional braking, and has the ability to apply the brakes, why doesn't it do so properly?
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On my limited sometimes when I am driving randomly and a car is in front of me but not far up my collision warning signal goes off.
It's only happened about 4-5 times and I am not sure what sets it off or how it even really works?
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Have any of you noticed the collision warning popping up on the dash while driving? The first couple of times I missed what was popping up since I was busy driving and not getting into a collision. The last time, however, I did notice. A car was making a right turn up ahead and had almost stopped in the lane..
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How do I turn up volume on this very important safety feature that i can barely hear. It's ridiculously low and the dumb ding dong I'm home nav notification blows my ears away.
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The cruise control on my 2013 works as I expected.
However the cruise control on my 2016 Sonata does not.
When driving at highway speeds (65 to 70 mph) in cruise control and the shifter set on "D" (drive) the transmission will down shift to 4th speed whenever I go down hill.
This might be intentional as a way to keep the car from exceeding the set speed, but I have never heard of this and it would seem to place more wear an tear on the transmissions.
Do the down shifting is engineered in or if it is a service problem that I need to have addressed...
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I love the car and SCC is one of my favorite features. I've had good experience with the SCC most of the time - if car in front of me is moving and then stops, it reacts well. (Also was pleased to learn I can resume SCC from a stop by just tapping the accelerator, no need to hit resume like the LCD screen implies).
However, the one situation is when I'm going like 55mph, and up ahead there's a car stopped completely. I'll see a thing on the dash that the SCC recognizes there's a car ahead, but it won't hit the breaks till the last minute. Truthfully, I end up hitting the brakes myself in most of these situations.
I've got the longest distance selected (though i've tried it with short following distance too) and my car is a Limited 2.4 GDI.
SCC stops fine if slower car ahead stops. Seems a little risky when car ahead is already stopped (waits till the last second for brakes?).
I've also tried changing the setting for cruise control response from "normal" to "fast"...maybe i'll try "slow?"
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My 2010 Subaru Outback recently surprised the hell out of me by simultaneously turning on the brake warning light, the traction control light, the check engine light and (just for a bonus!) disabled my cruise control while flashing the cruise control light. I pulled over, quickly surmising that all of those systems could not have failed at 70 MPH without instantaneous death to either me or the vehicle. Both apparently still being alive, I tried turning the car on an off to reset the lights. No go. Subaru was not going to miss this chance to get me to the dealership! (who I had avoided to this point!) As I was far away from home and the car being very healthy, it seemed, I decided to drive on. I proceeded to put a couple of hundred more miles on the car before I got back to town.
My car had 39,000 miles on it, 3,000 miles beyond the warranty end. I learned that I have an error code of P0171, "Fuel Trim Malfunction (Air/Fuel too lean)". So I guess I'm wondering about a few things...why would this sensor set off every light on my dashboard and disable my cruise control? Seems a bit overblown for running a bit lean. My gut tells me Subaru has a sensor/software problem they are not owning up to. I'm a big fan of conspiracy theories and this really smells like one...
Second, jeez, I'm only 3K miles over warranty, don't you think they'd cut me some slack. I mean I love my Subaru, or did anyway, until this happened. Now it's just another POS car that breaks for no apparent reason...
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I'm kind of up against the clock. I am sure this answer is in a book in the car. But that book looked pretty thick.
My husband just told me that he did not want to take my car to the ball game because he can't stand the cruise control turning off every time it gets even close to a car (yes, I understand what this may mean, but I'm not driving with him and he is a grown man).
Is there a way to disengage the automatic turn off on the safety cruise control feature? He likes to be the one in control I suppose.
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I just got a new 2015 Prius C Three and have been reading up as much as possible. I wanted to know if using cruise control would give me better MPG. If it's just a matter of 3/4 mpg difference, then I would use the cruise control to rest my feet. But if its a big difference, then I would avoid cruise control.
My daily commute from Germantown, MD to Alexandria Va and back is about 40 miles each way: total 80 miles. 90% of that highway on I-270 and I-495. I leave after morning rush hour and again drive back after evening rush hour.
Last couple of trips without cruise I have been getting around 50~52mpg.
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I was driving and the turned on my cruise control on my car and then the vsc, red triangle, and the check engine light came on. It happened before but the next day when I was gonna take it to the dealer. All the lights have turned off. I have a 2009 Prius
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About two months after I lowered my TCH I started getting a warning that my Pre-Collision System was malfunctioning.
I brought it into the dealer to have them investigate the issue, and after having my car for three days they said they couldn't find anything wrong with the system, and it's probably because I modified the ride height of my car.
The question that immediately came to mind was, why did it take two months for the error message to pop up? Why not right away? They didn't have an answer and just said, "If it's modified we can't do any warranty work, and can't say for sure what's causing the issue."
So I've adjusted the ride height back to stock and now I just need to take it back to the dealer to have them look at it again. If it really is the modified ride height, can i re-calibrate the sensors?
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I have a 2013 Avalon Hybrid and am having trouble while using the cruise control. The "sensor needs cleaning" goes off although the sensor has been cleaned several times. Also, the sensor sometimes doesn't register a vehicle in front of me. The Avalon has been looked over by the dealer (several times), the sensor was replaced but the problem persists. Because it works periodically, it's difficult to diagnose a problem. Also, the PCS warning goes off periodically. Not sure if that's a related problem. It has gone off while driving through an intersection with traffic sensors (not consistently).
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My 2009 Prius was parked for two weeks. When I started yesterday the red triangular warning light, circular yellow light with exclamation symbol in center, and vsc warning lights did not go off. No previous problem with these. Top half of display screen blank. Vehicle started/ran normally. No change in handling or braking. On highway, cruise control would not activate.
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2012 GLS ... For a few weeks after buying my car, the cruise control electronics were perfectly responsive.
I find that after a few thousands miles, I am able to turn ON the cruise control easily, but often now pressing the 'Set' button doesn't do anything until I press the On/Off button and turn it back on, hit Cancel a bunch of times, and THEN it might let me 'Set' the CC.
It kind of scares me to think that the CC could malfunction and not let me turn it off AT ALL one day, which is far worse than simply not being able to set the CC.
Would the dealer be able to simply "reset" the electronics pertaining to these controls?
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I've had my Sonata for six days, and I love it... Except... The cruise control doesn't work. At all. Never did. I tried pulling up on the brake pedal like another poster had suggested, but that didn't do a thing. Looks like a trip to the dealership is in order...
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Mine has done it a few times now. It seems to do it going up a very long gradual to steeper incline, such as climbing some mountains, when set to 60 MPH. It'll start dropping down until it gets to about 47 +/- MPH, then the cruise just kicks off. No downshifting in sight...
There's a stretch of route 219 through PA heading north towards NY that I encounter about once a month. Yesterday was the 2nd time I've had my Sonata on this trip, and it did it again. It actually did it twice last month on this trip.
The dealer reset the transmission computer due to very cold weather "slipping" from 1-2 shift after the first trip. It appears that didn't take care of this issue, though I didn't mention it to the dealer at the time (it slipped my mind).
I'm reluctant to take it to the dealer, since odds are they won't be able to duplicate the issue. We don't have any roads around here quite like the one this happens on.
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Had an odd event this morning on my drive into work. Put the cruise control on at about 75 mph, after several mins came up to traffic and as I pressed the brake the car began to speed up and the engine revved up, I had to press the cancel button on the cruise control to disengage it. Immediately after disengaging it, the ESC came on solid. Once at work, I re-started the car without issue and the ESC light went off. Didn't try the cruise control again on the drive in.
2011 Sonata Limited with approx. 55K. Bought new in Feb in 2010. I have had the brake stop recall performed several years ago.
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Bought a Sonata Limited with 5500 miles on it from local dealership. Soon after I noticed that the cruise did not always engage. Problem is that when I brought it in for service, no one was able to duplicate the problem. What to do?
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When I turn my Cruise Control "On" it will light up green on my dashboard, However when I press the "set" button to set the speed nothing happens. It was working fine a few weeks ago. Could it be a fuse? If so what fuse? How I can fix this? 2011 Sonata
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I have a 2006 sonata gl that's recently had an engine/transmission swap out of a 2007 sonata gls both 2.4L and auto. My car does not have ABS but the donor car did (from what i ready on other threads that important!). Now only a few days after the swap, i am getting a P2159 code (which i believe is for the vehicle speed sensor) and the cruise control doesn't work. Other than that the transmission shifts smooth and every thing else works good, including the speedometer (shouldn't it be off if the VSS is bad?).
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After install. of a non original cruise control unit, the yellow eng. warning light is on all the time, my trip/fuel computer does not work, and the engine cuts out when driving, just for a sec, then it runs again. An OBD test says "speed sensor fault". My mechanic have not been able to find the problem.
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