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Lane centering assist jerking car into another lane

24K views 83 replies 38 participants last post by  eagleeye  
#1 ·
So on my 1000 mile trip I noticed some unsettling/dangerous behavior. The Lane Centering function several times would jerk the car strongly during turns, causing the car to force itself across the lane lines into the next lane over, or off the left or right side of the road (depending which lane I was in at the time). When this happened it would seemingly push strongly once or twice against the line I was holding the vehicle on, and then forced further, crossing the line and setting off the lane departure warnings. My hands were on the wheel and in all the cases it overrode my hold , forcing me to very strongly correct back.

All very disconcerting and fortunately since this was during the night mostly there was little traffic, but it could’ve been bad, if someone was next to me.

Anyone else have this problem, especially anyone else with a 2022? I’m going to the dealer when I get back but in the meantime just have to leave it disabled as it’s too dangerous to use. Possibly something with bad Eyesight calibration?
 
#2 ·
It's possible that your Eyesight calibration is off, however the problem you've noted has existed in the Lane Centering from day 1, and the system seems not to want you to correct the steering at all, or it will fight you - the line you "hold" if it isn't what the car wants, it will continue to try to overcome your grip and when it does, then it will over-correct.

So it works best if you only lightly touch the steering wheel and let it auto-steer and if you need to over-ride it, do so with an extremely firm grip and then turn the thing off.

The bottom line is that either you steer, or the car steers, but both steering at the same time does not end well.
 
#16 ·
This. Drove from LA to Fresno today and had LC on most of the way (except when eyesight kicked off due to the rain or it turned itself off due to the rain). I’m slowly leaning not to fight it so hard and just sort of guide it while it does it’s thing. Overall it was a fairly pleasant experience but it’s something you have to want to learn to use, otherwise it’s just gonna piss you off.

The 17's just had Lane Keep ASSist, not Lane Centering, and I found it to be a ping ponging from lane marker to lane marker gimmick that was unsafe.

Gen 6 has both. LKA when over 40mph no cruise on, and LC with everything on.
Lol. Hating on technology they don’t even have. Probably should stay off their lawns too.
 
#3 ·
Interesting, thanks for your post. I guess I’m mostly familiar with hyundai’s system and was not expecting such “aggressive” correction/overcorrection. I’ll test again on the return journey (during low traffic periods obviously) and try to keep just a light touch and trust the system, and see what happens.
 
#5 ·
@DanielAcosta needed a new windshield and had his Eyesight system re-calibrated, to include a dynamic on-road calibration and he found that Lane Centering and other Eyesight functions worked better than ever.

If you think that the car is consistently trying to "center" your car too far to one side, it could be an Eyesight Calibration issue. On the other hand, I like to drive with my car hugging the left side of the lane at all times, and I feel like Lane Centering is holding the car too far to the right for my comfort, but it's only because I'm a left side hugger. I haven't verified it but my gut feeling is that the car is correctly holding my car in the center of the lane - maybe I should have someone follow me to verify.

If I have Lane Centering on and try to hold the car to the left side of the lane, the moment my grip slips it will veer to the right, possibly crossing lanes in the process.
 
#7 ·
Try changing it from "drive on right" to "drive on left" as many drivers find that holds a lane position more to their liking.

Other than that, the best thing you can do is what @SilverOnyx suggested and lightly hold the wheel. If you don't like where the car is going, rather than overriding it try just clicking it off with the top right button on the steering wheel, which will immediately release the pressure on the wheel. Then click it back on so it will reacquire the lines and try again.

When we first got the car our reaction was like yours and everyone else's in that the car would seem to overcorrect our manual inputs. It doesn't play as well as systems from Honda and others in response to driver inputs, works much better with gentle nudges and simply clicking it off if the disagreement takes more than gentle pressure.
 
#13 ·
Is Lane Centering jerking or just turning off? Mine will sometimes turn off momentarily when going around curves. Alarms sound, lights flash and suddenly the car is in full manual mode until it decides it can handle the situation again. Depends on the speed and how sharp the curve is. Keep your hands on the wheel or you will fly off the road when this happens..
 
#20 ·
This. Mine turns off all the time but that’s Texas roads.
some lanes are too wide and then they repave Without lines for a while. Then when they fix cracks it tries to think the patched cracks are new lane markers

I however use it all of the time. Bad-river cruise and lane departure mean I get to chill when highway driving. My trips take longer as the difference between 75 and 70 in gas is real but I can chill when driving
8 miles short of 1k miles after 2 months. 80% highway
 
#22 ·
I turned lane centering off the day I bought the car, and will never turn it back on. lt seems like a dangerous feature to me. I can see maybe using it on long road trips, but if I could drive 18 hours in my 04 wrx without any issues, I doubt I'll have problems in the 18 outback. If you're trying to go around an obstacle, or a stalled car on the shoulder, it pushes you back towards it. My .02 cents.
 
#25 ·
It doesn't do that if you use your turn signal. It may be a slight impediment if you suddenly come up on something on the road and have react suddenly but it’s not going to fight you. I’ve had this happen a few times but I’ve not had any problem maneuvering the car around whatever obstacle as needed with either LKA or LC enabled.

In fact, in the Gen 6 if you use your turn signal Lane Centering is automatically disabled (the icon turns from green to white on the dash) and Lane Keep Assist won’t kick in. Not sure if the Gen 5 acts the same way though.
 
#24 ·
@DanielAcosta can you share the details of how you were able to get your Subaru dealership to do a dynamic on road calibration? Ours does the same as OPs, but the more annoying thing is the side to side weaving, it’s basically constant and makes my wife and daughter both sea sick. You can literally see the wheel turning back and forth, probably 3 or 4 degrees each direction.
 
#26 ·
I'm about to shut mine off. It fights me way too often when there is zero need, the car isn't headed off the road, I'm not close to the line. Sometimes the wheel jerk seems way to violent for whatever the car thought it needed to do and I've had to really get mean with the wheel. Not screwing with it anymore and don't have time to dick with the service department putzing with it so I can "try it again". I don't need it to drive the car so it doesn't matter.
 
#30 ·
One thing that people keep confusing is lane centering vs lane keep assist, and when people say "mine does that" they aren't necessarily specifying what "that" is and whether it happens using lane centering with adaptive cruise, or Lane Keep Assist, which can be set to nudge the steering wheel if you wander out of a lane - Lane Keep Assist will not keep the car centered and will ping pong by design.
 
#35 ·
The term LKA or Lane Keep Assist isn't a thing on Gen6, or at least on 2022. It's now called LDP or Lane Departure Prevention and it's on all the time unless you go into the Eyesight screen and turn it off. The button on the wheel that used to toggle LKA on/off no longer works for LDP but works only for Lane Centering, a function of Adaptive Cruise Control. Outside of ACC the button has no function.
It would be nice if when ACC is turned off the button on the wheel would default to control LDP. This would make it a lot easier to toggle the feature off if it was acting in an unwanted fashion, but then easily be able to be turned back on. Now that is only possible by surfing through screens.
When I was speaking above about a feature jerking the wheel I was speaking of LDP, the old LKA, not LC.
 
#33 ·
It’s worth repeating that if you overpower LC and then suddenly release your pressure on the steering wheel, it WILL overreact and jerk in the opposite direction. Either slowly release your pressure, or better yet just click it off with the bottom right button on the steering wheel and then try turning it on again.
 
#41 ·
Probably not. Mine was calibrated fine from the factory as it seems the majority are.

As for Lane Keep Assist and Lane Centering, I’m reading a lot these issues with a large grain of salt. I use both systems regularly (LC is growing on me) and while LC can get a bit squirrelly at times I’ve never had it steer me in a wrong lane or even make me feel like I'm not in control. I’ve certainly never had to “fight” it for control and the off button is right there on the steering wheel. Now LKA by itself can do those things but it’s not designed to steer the car, just to assist you keep between the lines safely, you still need to steer.
 
#39 ·
So on my 1000 mile trip I noticed some unsettling/dangerous behavior. The Lane Centering function several times would jerk the car strongly during turns, causing the car to force itself across the lane lines into the next lane over, or off the left or right side of the road (depending which lane I was in at the time). When this happened it would seemingly push strongly once or twice against the line I was holding the vehicle on, and then forced further, crossing the line and setting off the lane departure warnings. My hands were on the wheel and in all the cases it overrode my hold , forcing me to very strongly correct back.
All very disconcerting and fortunately since this was during the night mostly there was little traffic, but it could’ve been bad, if someone was next to me.

Anyone else have this problem, especially anyone else with a 2022? I’m going to the dealer when I get back but in the meantime just have to leave it disabled as it’s too dangerous to use. Possibly something with bad Eyesight calibration?

Having the exact same problem. i generally don't use it unless I know that there are reasons why I might need an extra eye on the road. however, that jerking motion almost caused me to sideswipe a car last week and I am cautious about using it at all now, unless I'm trying to place a call or do something that might distract my eyes from the road. once the operation is complete, i turn the LKA off for safety!
 
#40 ·
@DrSuSE The factory calibration should be fine - just that some aren't very good so unless you notice issues I would not ask them to do extra work. It's like how some people have wheel alignment off from the factory (rare) and a re-alignment might be warranted.

@So subie are you sure it's lane keep assist and not lane centering you're talking about?