2022 Hyundai Ioniq 5: adaptive cruise control problems

Filed Apr 1, 2025 · Acceleration, Driver assistance · TX

Instrument panel on car will not turn on when car is started. Thus, all advanced cruise control and safety systems do not function. Car has not been to the dealership for repair yet. There were no warnings or any other indication that there was an impending problem.

Filed Mar 16, 2025 · Acceleration, Driver assistance · PA

While driving on the highway in foggy conditions, the smart cruise control system and forward safety system suddenly shut off while I was going 70 miles an hour. This almost resulted in a car rear ending me due to the sudden deceleration. The following day, with clear weather, the same issue happened again despite nothing appearing to have caused this issue while I was driving. This is a very serious concern to suddenly stop on a highway.

Filed Apr 5, 2024 · Driver assistance · CA

ICCU stopped charging my auxiliary battery (Hyundai Ioniq 5). I couldn’t figure out why, but I began carrying a portable charger with me which instantly got my car going again. One day during a particularly nasty snow storm, my battery was dead again and I jump started my car. I drove it about 40 feet before I realized it needed snow socks. I stepped out of my car and got back in and a whole myriad of warnings were going on. I got a code for the vent flaps (snow had got stuck in there…that was an easy fix. Also my Auto Hold light, Check ABS light, and Smart Cruise Control warning indicator lights were all on and are still two months later still not working. The car otherwise operates well enough to drive as I replaced the auxiliary battery. Since replacing the battery, the car operates as well as the ICCU (it charges the new battery) but the previous issues remain.

Filed Dec 12, 2023 · Electrical, Visibility · 22,000 miles · FL

The contact owns a 2022 Hyundai Ioniq 5. The contact stated while driving in rain or snow the rear windshield failed to be cleaned. The contact stated that the failure was a dangerous while driving at night while the headlights from vehicles behind caused the rear windshield to become opaque. The contact questioned a dealer and was informed that the vehicle was designed that way and that the windshield needed to be cleaned manually. Additionally, the contact stated that the vehicle lost electrical power while driving at approximately 60 MPH with the cruise control activated. The contact stated that the vehicle lost motive power with several unknown warning lights illuminated. The contact pulled over, stopped, restarted the vehicle, and the vehicle functioned as needed. The contact stated that the failure recurred once. The manufacturer was informed of the failure. The failure mileage was approximately 22,000.

Filed May 9, 2023 · Brakes, Lights · NY

When using the car in "i-Pedal" (one-pedal driving) mode — the highest brake regen setting — the car can come to a complete stop whenever I lift my foot off the accelerator pedal, without touching the brake. While in this mode, when I fully lift my foot off the accelerator, the rear brake lights illuminate as expected, however, I often slowly reduce pressure on the accelerator pedal to come gently to a stop. I've noticed that it's possible (and often the case) that I can decelerate to a full stop without the brake lights illuminating until I fully release the brake pedal (at the very last moment before I stop). This means that I can be slowing down at a pretty significant rate without any indication to the drivers behind. Conversely, when using the automatic cruise control (that keeps the car a set distance from car ahead), the brake lights seem overly active and flash on and off quite frequently, especially when going down hills (even if there is no deceleration and the car seems to be coasting). Both of these anomalies seem to aggravate other drivers following the car for different reasons, since the vehicle's intent isn't being properly communicated. The lack of expected brake lights when decelerating gently via i-Pedal mode seems potentially dangerous. I would recommend that Hyundai tune their software so that the brake lights illuminate automatically past a set threshold of deceleration/regen braking (above what would be expected if the car were simply coasting), but not requiring the driver to fully lift off the pedal, since at that point, the rate of deceleration is already uncomfortably high for typical driving.