2022 Hyundai Tucson Hybrid: false forward collision warnings

Filed Jul 29, 2026 · Engine, Fuel system · VA

On XXX the vehicle lost motive power while my wife was accelerating to merge onto a highway with our two young children aboard. It would not accelerate and she was forced to pull over in an active merge area. Simultaneous warnings illuminated: Electronic Parking Brake, ESC, Forward Collision Avoidance, Blind Spot Detection, and hybrid system, with "Check Hybrid System" displayed. No crash or injury occurred, but loss of propulsion during a highway merge created serious collision risk. This is a recurring defect documented since early 2023: Hyundai's own Blue Link telematics auto-flagged an Engine Control System DTC on XXX; a jump-start was required XXX (dealer RO #XXX); check engine light and stored CAN-bus codes U100387, U100100, U004600, U010100 on 08/10/2023 (RO #XXX); and a September 2023 incident in which the center display shut off during reverse, disabling the backup camera. Hyundai performed Service Campaign 9B4 (BMS software update, DTC P1BB20, TSB 25-01-010H-1) on this VIN on XXX; the same failure category recurred 84 days later. The vehicle was towed to Safford Hyundai of [XXX] onXXX and has remained there 65+ consecutive days. The dealer replaced the 12V battery (defect persisted) and the Hybrid Power Control Unit (HPCU); per Hyundai Consumer Affairs' own written email ofXXX, the check engine light returned after the HPCU replacement and the cause "remains unidentified." The dealer states it cannot determine the root cause. The vehicle IS available for inspection at Safford Hyundai of Springfield, [XXX]. Five Hyundai Consumer Affairs cases exist on this VIN (current: #XXX). INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 9, 2025 · Airbags, Brakes · TX

All warning lights and audible alarms started going off at the same time. EPS, ABS, Auto Hold, Collision warning, Air bags, All wheel drive, brake system, and more.1st time it happened was [XXX], while driving. The car was drivable but I did notice a difference in braking and acceleration. I parked and turned off the car. I did turn the car back on several times and the alarms continued. I finally turned it off for 10 min, and all alarms stopped, but the check engine light stayed on. Car sat overnight and all warnings had stopped. Took it in for service, and issue could not be duplicated. 2nd time it happened was [XXX]. I had to have the car towed since it would not move when in drive or reverse. Alarms were still going off when it made it to service. They replaced the brake harness. 3rd time happened on [XXX], 3 days after the brake harness was replaced. Towed it to service and they replaced the engine harness. 4th time was on [XXX], 2 weeks after engine harness was replaced. This time there were no audible alarms, just all of the visual ones. Same performance issues as stated before. This issue seems to have happened to several other Hyundai owners as well, as per complaints in Reddit and on Hyundai forums. There does not seem to be a consensus for what is actually causing this issue. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jul 28, 2024 · Driver assistance · CA

While driving over 50 mph the emergency brake has initiated 3 times in a 4 month period. There are no cars in front of my vehicle and it is not the collision warning but it will flash on the dash the the emergency brake is engaged in red, it will make a warning beeping noise and the car will brake on its own.

Filed Feb 7, 2024 · Driver assistance, Lights · AZ

Driving at night when it snows is unsafe. The forward collision warning sensor is covered with snow within minutes and so are the headlights. They are placed in the front bumper and covered with snow because by their design they are not flush with the bumper. They are sitting deep within the bumper which creates a trap for snow and slush. I hade to stop every few minutes to clean the headlights from snow because they were covered and I couldn’t see anything in front. It’s a design flaw.

Filed Jun 20, 2023 · Engine, Fuel system · 4,000 miles · GA

The contact owns a 2022 Hyundai Tucson. The contact stated while driving at an undisclosed speed, the hybrid alert warning light illuminated, and the vehicle then decelerated. The contact veered the vehicle off the road and turned the vehicle off and restarted the vehicle. The collision alert and check engine warning light illuminated. The vehicle was taken to the dealer where the contact was informed of an unknown issue with the power train however, the contact was informed that failure was corrected independently and that the check engine warning light needed to be reset. The vehicle was repaired; however, the failure recurred. The manufacturer was notified of the failure and provided a case number. The failure mileage was approximately 4,000.

Filed Mar 15, 2023 · Driver assistance · 500 miles · WA

The contact owns a 2022 Hyundai Tucson. The contact stated that while driving at various speeds with the Collision Avoidance System (CAS) engaged, the vehicle would abruptly stop. Additionally, the vehicle also jerked to the right or to the left. Additionally, the instrument panel, gauges, and the radio unit went black. The contact stated that the wheel was firmly gripped, and the vehicle veered to the side of the road. The contact also stated that although the Collision Avoidance System (CAS) had been disabled the feature automatically reactivated. The vehicle was taken to the dealer but was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was approximately 500.