2018 Hyundai Sonata driver assistance problems

Filed Aug 16, 2025 · Brakes, Driver assistance · IL

About a year and half ago, a lot of my engine trouble lights turned on while driving. It was sleeting at that time when the lights turned on and they're still on today. I paid to have the Hyundai dealer to check it out soon after the trouble lights first turned on. They diagnosed the problem as a faulty HECU. I would have had them replace this, but they estimated it would cost about $3800 to fix. This HECU malfunction is causing the following issues: ABS does not work, traction control does not work, forward collision prevention does not work, brake auto hold does not work, cruise control does not work probably because it can't auto brake any more. I've had some scary times driving and trying to stop when the roads have been wet or snowy.

Filed Jul 15, 2025 · Driver assistance · IA

When starting car warning lights came on for ABS, AEB, Cruise Control. Cruise control is locked out and not working due to these warnings.

Filed Mar 17, 2025 · Driver assistance · GA

BSD system stopped working one day along with the Rear Cross Traffic Alert.The button which operates system does not come and system does not work. Warning lamp lit on instrument panel and said" check B SD system" meaning the whole system doesn't work. Took to my local shop and they couldn't repair as they stated the system is a proprietary system the had no software. service bulletin #19-BE-009H was issued in 5-19 by Hyundai for this issue with car. So there is a know problem

Filed Feb 11, 2024 · Brakes, Driver assistance · MA · crash · 1 injury

Vehicle 1 operating normally in traffic on [XXX] in Westfield MA. Operator 1 notices alert on dashboard. As Operator 1 looks down briefly and returns eyes immediately to the road, she sees Vehicle 2 braking to slow or stop. Operator 1 depresses brakes, but vehicle does not slow as it usually does, nor does Automatic Emergency Braking engage as it always has in the past. Front of Vehicle 1 makes contact with rear of Vehicle 2. Dashcam footage appears like brakes did not activate at all, either manually or automatically. Vehicle 1 airbags deploy. Westfield Police respond, as well as Westfield Fire, who cut the battery cable. Vehicle towed to Interstate Towing, Inc. Yard 5, 20 Clifton St, Westfield, Ma 01085. (413) 593-1900 interstatetowing.com. Owner 1 viewed vehicle at tow yard, and noted that the battery was completely melted, with only portions of the plastic casing along with internal plates visible. Much of the plastic and rubber components immediately adjacent to battery location were melted and deformed. As a layperson, it almost appears as though the battery was in the process of shorting out just prior to the collision, possibly rendering many of the safety systems inoperable. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Nov 27, 2023 · Driver assistance, Seats · 157,000 miles · TX

ABS module stopped working and the ABS module light is on. Car automatically brakes by its self sometimes or locks up at stop lights creating dangerous driving situations

Filed Nov 21, 2023 · Driver assistance · KY

Warning lights keep coming on for ABS and Blind Spot Detection. Please help as I know this has been recalled in other 2018 Sonatas. So why is my VIN # not included in these recent recalls?? I FEAR for mine and my daughter's safety as she turned 16 in February 2023 and started driving this car in August 2023. PLEASE HELP!!

Filed Aug 20, 2023 · Driver assistance · VA

Right wheel speed sensor failed in feb 2023 now left rear wheel sensor has failed in aug has 50486 miles

Filed Dec 2, 2021 · Driver assistance · NY

when the car is cold it would not start. I checked what the problem can be online and it turns out that there are a lot of out cars with the same problem. The problem is starter. sever people after changing the starter there vehicle was fixed. Another problem is sometimes the blind spot warning system does not work. These problems are reported by people with the same car but not by dealers.

Filed Jan 23, 2020 · Driver assistance, Electrical · 51,160 miles · VA · fire

This car has a mind of it on when I turn on heat the radio station goes static very bad engine light keep coming on go to dealership they keep on reset instead of fixing it yesterday my starter burn out .just out the blue with no warning sign it was going out

Filed Nov 29, 2018 · Driver assistance, Lights · TX

Since the year 2017 when using a portable audio device connected to the power outlet the system turns on and off.drivers fog light been repaired twice in july 2018.left fog bulb been removed previously installed found burned grease was added to socket grease was also put on sensor on driver door because radio system was staying on after turning vehicle off,closing driver door and after clicking the alarm to lock door radio was still playing. Driver brake light had to be replaced. September 2018 removed and replaced the fog lamp/drl assembly the socket for the bulb melted,causing the plastic to warp and the connector with new bulb would not lock in.now the wipers are bad. I'm also having other problems with the brakes and gas mileage but because it can not be detected I'm been told it's nothing wrong with it.just like when I told them it was something going with the lights but it was nothing they could do. No I'm not a mechanic but I know that I'm not supposed to have all these problems with brand new 2018 model I didn't have do this much repair on use car. I been complaints about this car since I bought it and they just been giving me the run around telling like the gas mileage reading is not going to accurate you sometimes have to just estimate or things go out. I have two hyundai sonata the difference is one just another color and I'm not having all these issues with it.at least not yet.