[thematthatter93]

Anothe 2021 Ioniq Hybrid owner here with the same issue (autohold and EPB warning lights randomly coming on while driving, along with a persistent "AUTO HOLD turning off press brake pedal" message and alert sound. Absolutely frustrating. Took it to a dealership yesterday and tried to get them to listen to me about how this seems to be a common problem with this make/model/year, and that there's an existing TSB about. They wouldn't listen to me. They just ran it through the standard inspection (useless) and said they couldn't find any codes or recreate the problem. And of course, the problem re-occurred 20 minutes later on my way home. Today I'm starting over with another dealership. I left no wiggle room in asserting how there is a TSB direct from Hyundai about this. I even drove around this morning with my wife in the car to take video of it happening. Service Rep said he remembers he worked on a vehicle recently that needed the wiring harness for the EPB replaced, so hopefully he knows what I'm talking about. I gave him the TSB number and will print several copies before my appointment. Wish me luck, I'll let you know how it goes.

how did the appointment go?

 

[jddrokutv]

Hi Everyone,

I own a 2021 Hyundai Plug-in Ioniq and brought it to the shop 2 weeks ago. It had the same symptoms (EBP and Auto-Hold in a brown gold color) and once you press the cruise control orange triangle lights popped up.

I took it to the local dealership here in St. Pete Florida and they are looking at it now. Getting car service is horrendous though as I dropped it off 2 and a half weeks ago and they still have it. Still though I rather have it fixed then get it back not fixed. Also they didn't seem to reference the TSA but I will bring it in again if I still get errors and reference directly. It was a voluntary drop off as well.

I came from a 2004 Toyota Prius. before getting this. Yes at times the Prius had problems over the time I had it through 2021 (it was used, the battery had to be replaced once, drove like an appliance, the gauge went out) but i also bought it used and there are many aftermarket ways to get this fixed. It was also $11K when I bought it and i bought it used in 2011. Compared to $30K for the Ioniq.

I was expecting better quality with the Ioniq and to not have many of these dashboard errors but I get errors all the time such as the engine light that disappears if its not charging correctly (not as annoying) and now this ebp and auto hold stuff (This is distractingly annoying). Let's just say I am not impressed but I understand this is growing pains and quirks I can learn to grow with.

Hopefully this software update fixes these issues.

 

[thematthatter93]

Hi Everyone,

I own a 2021 Hyundai Plug-in Ioniq and brought it to the shop 2 weeks ago. It had the same symptoms (EBP and Auto-Hold in a brown gold color) and once you press the cruise control orange triangle lights popped up.

I took it to the local dealership here in St. Pete Florida and they are looking at it now. Getting car service is horrendous though as I dropped it off 2 and a half weeks ago and they still have it. Still though I rather have it fixed then get it back not fixed. Also they didn't seem to reference the TSA but I will bring it in again if I still get errors and reference directly. It was a voluntary drop off as well.

I came from a 2004 Toyota Prius. before getting this. Yes at times the Prius had problems over the time I had it through 2021 (it was used, the battery had to be replaced once, drove like an appliance, the gauge went out) but i also bought it used and there are many aftermarket ways to get this fixed. It was also $11K when I bought it and i bought it used in 2011. Compared to $30K for the Ioniq.

I was expecting better quality with the Ioniq and to not have many of these dashboard errors but I get errors all the time such as the engine light that disappears if its not charging correctly (not as annoying) and now this ebp and auto hold stuff (This is distractingly annoying). Let's just say I am not impressed but I understand this is growing pains and quirks I can learn to grow with.

Hopefully this software update fixes these issues.

We just dropped ours off yesterday and it is the wiring harness connects to the brakes. They are currently replacing it. It’s probably best if you contact your dealer and get them to go ahead and replace it so that you won’t have this issue any longer.

 

[jddrokutv]

We just dropped ours off yesterday and it is the wiring harness connects to the brakes. They are currently replacing it. It’s probably best if you contact your dealer and get them to go ahead and replace it so that you won’t have this issue any longer.

Update -12/12/2023 - It's been in the shop since November 18th, and they identified the same issue correctly and ordered the parts to fix the brake issue per the TSB. I will provide an update.

I am glad the dealership identified the issue, but the service wasn't the best. Finally, after the 4th week they gave me a rental but that is a whole different issue. Hopefully you all had a better experience then me.

 

[jddrokutv]

Received back 12/13/2023. There seems to be no issue so far in daily driving. The service was horrendous and I think Hyundai needs to update their policy because its pretty strict, and what good is a 5 year warranty if it takes forever to get an appointment, get properly diagnosed, and fixed. It was 4 week turn around which is bad especially if there is no alternative. I didn't get a rental until this week and that was the 4 week mark.

I am just happy to get my car back but just less than impressed by the service.

 

[cmartinsdale]

Every time this happens I pull over, turn the car off, set and release the parking break 5 times or so, start up the car, and the issue is gone until the next time months later.

 

[SWO]

Ordered the new harness and will be changing it myself in the near future here. Will let everyone know how it turns out of course.

 

[Placebo]

Had mine fixed, they said a cable had come loose. They also did the 3rd year service at the same time, total cost was roughly 8,000Kr* (they replaced a battery and some other stuff apparently)

*I asked Bard to convert to a few common currencies:

• US Dollar (USD): $972.13
• Euro (EUR): €828.79
• British Pound (GBP): £720.47
• Australian Dollar (AUD): $1,122.20
• Canadian Dollar (CAD): $1,229.38

 

[Welshman]

So, I just got a used 2021 Hyundai Ioniq Hybrid about 2 weeks ago and I'm running into the same issue. How do I do a software update? Everything I've found so far only points towards updating the maps.

 

[mark1978]

Hello just found this thread as my 2020 Ioniq PHEV is having this exact issue for a few days now. Has anyone managed to get this fixed in the UK? Does the TSB from above even apply to the UK?

 

[mark1978]

Hello just found this thread as my 2020 Ioniq PHEV is having this exact issue for a few days now. Has anyone managed to get this fixed in the UK? Does the TSB from above even apply to the UK?

l took my car in and they carried out the work in the TSB. We will see if if works.

 

[JDoubleU]

Ordered the new harness and will be changing it myself in the near future here. Will let everyone know how it turns out of course.

Did the problem go away after replacing EPB harness?

 

[mark1978]

Did the problem go away after replacing EPB harness?

For me it did at least.

 

[Willow]

Special thanks to user0912 for the photos. And thanks to boburno and ScottChisonian for information about the technical service bulletins. I bought a used Ioniq Hybrid Limited in April 2024 (58k miles) and I started seeing the same warning lights in September 2024 (63k miles). The car's performance has not changed, and I do not use the Auto Hold function. But the lights do concern me. Since it is a Certified Pre-Owned vehicle, I was able to reset the original warranty. Hopefully, with your information, I can have an easier time with my Hyundai dealership's repair department.
Bill
2020 Ioniq HL

 

[Willow]

Special thanks to user0912 for the photos. And thanks to boburno and ScottChisonian for information about the technical service bulletins. I bought a used Ioniq Hybrid Limited in April 2024 (58k miles) and I started seeing the same warning lights in September 2024 (63k miles). The car's performance has not changed, and I do not use the Auto Hold function. But the lights do concern me. Since it is a Certified Pre-Owned vehicle, I was able to reset the original warranty. Hopefully, with your information, I can have an easier time with my Hyundai dealership's repair department.
Bill
2020 Ioniq HL

I thought I’d be nice and write a follow-up. The problem has been fixed!
It took a bit of effort to prove that the work is covered by my extended warranty. My dealership calls it a CPO Wrap. I presented copies of the service bulletins from this forum. The service rep had not heard of them, and could not reasearch them. The service department diagnosed a faulty wire harness and replaced it. Problem solved.

btw, new tires made a HUGE difference in road niose, handling, and a smooth ride.

 

[garyrollinson61]

Change battery in key fob worked for me

 

[dhaval56patel]

I have a 2021 that I bought new. I have the same issue. They fixed it 3 times before the warranty expired. They "said" it was the rear brake callipers. They saw my uber/lyft sign in the window and "said" it was a common problem with cars used for rideshare drivers. They said that since the lights were amber, it simply meant that the epb and autohold were disabled but it was safe to drive. The warranty expired and lights are still on. Some days, they come on and chime with a message that flashes too fast to read, some days they just come on and some days they don't come on at all. I've put 87,000 miles on my 2021 ionic and I'm looking for something new. It won't be a Hyundai. If it's a common issue, why hasn't their been a recall.

hello mate, same issue what have you done with issue? replaced harness for it?? mine is not under warrenty charging 500£ to replace a harness. is it a good idea to go with it?

 

[snoho]

hello mate, same issue what have you done with issue? replaced harness for it?? mine is not under warrenty charging 500£ to replace a harness. is it a good idea to go with it?

Only you can answer whether 500£ is something you're willing to pay to restore a core piece of functionality in the car.

In my case it solved the problem.

 

[ioniqdriver72]

I found the TSB for the 2020 Ioniq. It is the same TSB as 23-BR-001H , only for the previous year. Still have not seen TSB 23-BR-001H, and have asked Hyundai to confirm its existence. This describes EXACTLY the issue I am experiencing.

Thank you for posting this document! I have had this issue with my 2022 Ioniq for a few years, finally got around to taking it to the dealer last month. I printed the TSB linked here after finding this forum, pulled it into the dealer with the warning lights on and DID NOT TURN IT OFF so that it wouldn't reset when they started it up again. I handed them the service bulletin and said, please run the diagnostics before the car turns off, I am certain this service bulletin is the issue.

They ran the diagnostics and sure enough, the problem was described and resolved by the service bulletin and replacing the parts detailed in it. I've been driving it for two weeks now with no further beeping or warning. It was completely covered under warranty.

Also for context, I am a small woman often judged to be a lot younger than my age. Just noting that here because I know it can feel intimidating to do car stuff as a woman who doesn't know a lot about cars! Coming into the dealership with the printed bulletin and background info I got from this forum really helped my confidence and I felt I was taken seriously.

Anyway, THANK YOU to this forum for the information and IONIQ camaraderie.

 

[havanasyndrome]

I found a random youtube video showing a zip-tie quick fix for the two cable harnesses on the two rear wheels. I think bumps can slightly dislodge the cable long enough to lose signal and the system trips the error, even if the cable connection was lost for a brief moment. Basically get long zip-ties and clamp the harness to the axle/wherever you can. I hadn't had a Auto-Hold/EPB error in a couple of months after doing this. I don't think it interferes with anything, and it's a temp fix until I can get an appointment at any Hyundai dealership (I don't know why they are all booked up for weeks in advance).