Failure to accelerate on occasion

[Rick Shin]

Just to chime in in gathering info, mine is also '15 3.8 HTRAC.

This is my first Hyundai ever. Based on their track record, is Hyundai likely to come out with a firmware to fix this issue? With enough people experiencing the problem, I feel like it's a design flaw, not an issue with certain batches of cars.

 

[OneOfOne]

esc is electronic stability control no? so its working the way its supposed to do when it senses slip. just about every car I have had in the last 10 years, 2 lexus, 2 infiniti has done this when I gunned it and it sensed wheel slip. especially in the snow it did it unless I was very gentle on the gas. It the computer sensors doing what they believe is their job. and yes it can be dangerous when it takes away the throttle response because of their logic and lack of knowledge about human intent. even nearly invisible sand such as is produced when puddles formed by rain evaporate leaving the fine sand can do this.

 

[Koolhaas]

esc is electronic stability control no? so its working the way its supposed to do when it senses slip. just about every car I have had in the last 10 years, 2 lexus, 2 infiniti has done this when I gunned it and it sensed wheel slip. especially in the snow it did it unless I was very gentle on the gas. It the computer sensors doing what they believe is their job. and yes it can be dangerous when it takes away the throttle response because of their logic and lack of knowledge about human intent. even nearly invisible sand such as is produced when puddles formed by rain evaporate leaving the fine sand can do this.

I don't think it's the ESC. The ESC light doesn't come on when my car has done it. I can't ever get it to when i'm just going straight, it only happens when i'm turning.

my lexus (both) would still accelerate during ESC activation. I think the Genesis does also.

 

[GenesisX]

The problem occurs when the tires have too much grip. Every all wheel drive car I've had has done it to some degree. Like I posted earlier, when it happens it's usually starting from a stop and making an immediate turn and it's almost always on flat ground. It sucks when your making a left and crossing traffic.

 

[jimb100]

I've had it happen once or twice but it was the transmission/throttle position sensor.

Step on the gas, nothing happens, release the pedal, apply again, transmission finds a higher gear then a lower gear.

Even at computer speeds with the 8 speed transmission and the number of sensors being monitored for best gas mileage, things get confused, on occasion.

First model year issue that will get a software update if enough people complain.

 

[amartz]

You've seen some of the threads about the air box flapper in here?

 

[craigt]

First model year issue that will get a software update if enough people complain.

Sorry to break it to you, but this is a 4th model year issue of the 8 speed transmission, starting in 2012.

If they didn't "fix" it for the 2015 after 3 years of complaints, I doubt they are going to do much to fix it via software on the current model year.

 

[mfrish]

mfrish, if you turn off ESC, does it still happen?

Turned off ESC and it didn't happen, so it's definitely an ESC issue, although I've driven many cars with ESC and never had this problem.

 

[jimb100]

Sorry to break it to you, but this is a 4th model year issue of the 8 speed transmission, starting in 2012.

If they didn't "fix" it for the 2015 after 3 years of complaints, I doubt they are going to do much to fix it via software on the current model year.

So you think they are using the same software and sensors in 2015 they were using in 2012?

Interesting.

 

[craigt]

So you think they are using the same software and sensors in 2015 they were using in 2012?

Identical software and sensors? Probably not. But when given ample opportunity to address a 3 year issue, and didn't (or couldn't), do you think a quick patch is forthcoming?

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[jimb100]

Identical software and sensors? Probably not. But when given ample opportunity to address a 3 year issue, and didn't (or couldn't), do you think a quick patch is forthcoming?

I think when you have new software and sensors you have a new issue.

Also, I think Hyundai wants nothing but positive word of mouth for the 2015 Genesis.

 

[Rick Shin]

I'm afraid that discussing this issue amongst us is not going to draw Hyundai's attention.

Is there a federal agency that will hear an issue like this? If the government thinks if this is of serious nature -- which I think it is, as quite a few people including myself were caught off guard trying to make a sudden start at a cross-section -- maybe they'll compel Hyundai to provide a software update.

 

[dirtyoldman]

Unfortunately, posting information like this on a forum isn't going to do anything as far as get Hyundai to investigate/fix the throttle lag issue some have experienced. The only way you are going to get the ball rolling is to make a complaint to the NHTSA and/or Hyundai directly and state that it is a safety issue. ie: The car fails to accelerate while you are making a turn across oncoming traffic.

The NHTSA has been slammed somewhat recently for being inept so they might actually care about new issues and investigating them.

 

[Rick Shin]

I'm bumping this old thread, because I think the problem still remains with Genesis 2015 and my car is due for next periodic check-up.

When I take my car to the dealership, how do I explain the issue? Is there like a short, precise term for this problem? Or do I describe the issue in a long-winded way?

I'd really like to fix this issue, because I feel really vulnerable with this problem lingering around.

 

[Ruff]

I too have had this problem on three occasions and have reported it to Hyundai America. Hyundai America said I was the only person to ever report this issue. They followed-up with me diligently and my car has been to the local dealership three times. They have checked many things over the three visits to the shop (Oct & Nov 2015), but could never determine what caused the failure to accelerate (my car would max-out at about 30 MPH like it had entered limp mode) and I could never reproduce the issue for them to witness. I technically still have an open case with Hyundai but neither I nor Hyundai have followed-up on the issue since November.

When you mention this to your service center, please let them know that others have indeed reported this issue. I used the term "limp mode" to describe how the car switched into a mode where it would not accelerate. Two of my three occurrences were when I was making a turn, but one was when I was on the interstate with cruise enabled. (It was especially scary to not be able to accelerate above 30 MPH on the interstate!)

 

[Nikgen]

I too have had this problem on three occasions and have reported it to Hyundai America. Hyundai America said I was the only person to ever report this issue. They followed-up with me diligently and my car has been to the local dealership three times. They have checked many things over the three visits to the shop (Oct & Nov 2015), but could never determine what caused the failure to accelerate (my car would max-out at about 30 MPH like it had entered limp mode) and I could never reproduce the issue for them to witness. I technically still have an open case with Hyundai but neither I nor Hyundai have followed-up on the issue since November.

When you mention this to your service center, please let them know that others have indeed reported this issue. I used the term "limp mode" to describe how the car switched into a mode where it would not accelerate. Two of my three occurrences were when I was making a turn, but one was when I was on the interstate with cruise enabled. (It was especially scary to not be able to accelerate above 30 MPH on the interstate!)

As I had previously posted, I have found the traction control to be WAY too aggressive and turn it off if I am accelerating strongly out of a parking lot where there is a slight curb lip that the rear wheels "bounce over" or when accelerating from a stop and making a hard turn where you might induce slight wheel spin.

It seems that almost ANY amount of wheel spin or hop will cause the TCS to kick in and virtually bring the car to a halt - the gas pedal seems completely unresponsive for a few seconds.

This phenomena is EXTREMELY dangerous when pulling out into traffic or crossing a two lane road - I almost got hit once as the car accelerated out onto the road, TCS detected a little wheel hop over the parking lot exit apron lip and the car just bogged down in the middle of the road for what seemed a few seconds.

 

[amartz]

At least with the G1, adding Rigid Collars to the suspension helped a lot, especially with picking up the right rear wheel in a tight turn, causing the ESC to kick in. You might consider it.

 

[Nikgen]

At least with the G1, adding Rigid Collars to the suspension helped a lot, especially with picking up the right rear wheel in a tight turn, causing the ESC to kick in. You might consider it.

I was talking wheel spin causing TCS to kick in if accelerating into a tight turn from a dead stop, so not wheel lift in that case. The wheel hop over a small curb when accelerating is probably unavoidable physically as the suspension seems to be doing what it should over a bump - but the momentary weight coming off of the wheels also creates slight wheel spin under hard acceleration and the TCS kicks right in (not clear if rigid collars would help that?).

In my opinion, the real issue is that the TCS should be toned down a little - both in how quickly and how strongly it responds. I feel it's current programming is overkill and actually dangerous in some situations if you don't anticipate it.

 

[amartz]

I was talking wheel spin causing TCS to kick in if accelerating into a tight turn from a dead stop, so not wheel lift in that case.

Sure it does. That's exactly what I was talking about. At least if it's a right-hand turn.

 

[Nikgen]

Sure it does. That's exactly what I was talking about. At least if it's a right-hand turn.

I should have added that, in my experience, the accelerating into a turn TCS response seems to really only be an issue an issue on wet roads - not on dry roads. In any case, the real issue is the overly aggressive TCS - a little wheelspin is not necessarily a bad thing or at least a less aggressive cut of the throttle response by TCS as it currently will literally just bog down in some situations.

I've learned to just shut it off in those situations - so a less expensive approach than modding a car that otherwise has exemplary handling traits (and that won't be around long enough to warrant investing in it).