2020 Hyundai Santa Fe: false forward collision warnings

Filed Apr 16, 2026 · Brakes, Driver assistance · AZ · crash · 1 injury

I was at a standstill waiting for oncoming traffic to pass with my foot on the brake and all of a sudden the car accelerated and the forward collision warning fail to come on and I hit a trailer because of it

Filed Jul 28, 2025 · Driver assistance, Electrical · MA

*Problem Parts:I only could check 1 box- should be Brakes and Steering too *ADAS: Lane Keeping Assistance too Over the course of two days, my 2020 Hyundai Santa Fe experienced a serious electrical and safety system failure. It started with the blind spot monitoring lights flickering in the side mirrors and warnings for Forward Collision Avoidance (disabled), ABS, Electronic Stability Control, Downhill Brake Control, Parking Brake & Brake Fluid (blinking red). The rearview camera failed and the screen remained on the radio display when in reverse. The Lane Keeping Assist Indicator shifted from white/green to orange. The next morning, I had trouble opening the vehicle with the key fob. Auto Hold, Master Warning, Forward Collision, ESC, and Downhill Brake Control lights were now steadily on. The MPH numbers on the dash were blurred, and a message appeared saying “Put in P” even though the vehicle was already parked. The accessories light came on, but the engine would not start. Interior lights continued to work. I had to manually open the car and start it by pressing the fob to the button. While trying to exit a parking garage (where a tow truck couldn’t reach me), more warnings appeared: AWD, Low Tire Pressure, Malfunction Indicator (not engine), and Power Steering. I felt tightness in the wheel and had to pull over. The temp and gas gauges dropped to zero along with the RPMs. I have a newer car battery and recently replaced fob batteries, so this was not a simple battery failure. I’ve reported the issue to Hyundai Consumer Affairs. No recall appears under my VIN, despite similar failures being widely reported in this model. I’m a single parent who typically drives with two young children, including one with serious medical needs. I rely heavily on this vehicle for medical travel. The vehicle has since been towed to a Hyundai dealership for diagnostics. This is a serious safety concern and could have led to a loss of control or failure in an emergency situation

Filed May 28, 2025 · Acceleration, Driver assistance · WI

Frequent intermittent dash warning lights, no speed indicated, no tach indicated, cycles through warnings of safety systems malfunctioning. No lane departure, no adaptive cruise, no cruise, no forward collision warning, no blind spot warning. The disabling of these systems puts all drivers at risk. Dealership replaced front camera and windshield to fix this issue. Not fixed, continues to alarm at random times while driving.

Filed Oct 18, 2023 · Driver assistance, Electrical · MA

Numerous different occasions since I bought the vehicle this year in March 2023 when on highway, side streets and even in parking lots with nothing, no cars no objects or humans in front or behind the vehicle my forward collision warning and rear end collision warning has came on which caused the car to break on its own and it is a safety concern. I have been to the dealer numerous times since I’ve bought the vehicle and currently have reached out to Hyundai Motors of America and pretty much got told to suck it up nothing they can do for me as the computer isn’t showing any codes or issues my car has now been at dealership where I bought it for 2 weeks now and no resolution besides come get the car and figure it out on my own and as a single mother with a child with disabilies I don’t know what else to do.

Filed Oct 12, 2023 · Driver assistance, Fuel system · IN

Catalytic converter is failing Lane collision warning failing driver side rear view mirror

Filed Sep 19, 2022 · Driver assistance · DE

The adaptive cruise control, automatic emergency braking, and forward collision avoidance systems in my SUV have been defective since purchase in June 2019. Hyundai has replaced the radar sensor but the dealer is waiting on a part to calibrate it which has been on indefinite backorder. I have waited over a year to have this issue fixed. I am paying a car payment which includes these features as the total cost and would like reimbursement for the cost difference, for the issue to get escalated and fixed, or the dealer to offer a vehicle buyback so that I may purchase a vehicle with no defects.

Filed Mar 8, 2021 · Driver assistance · 4,500 miles · CA

The 2020 hyundai santa fe foward collision avoidance assistance system is not functioning correctly. We have contacted hyundai on multiple occasions without response. The system is braking in the middle of the road without and cause. No cars are in any proximity and the car brakes in the middle of the road. This has occurred twice without warning in the last several months. Dealership has no answer when we took the car in. Hyundai consumer line does not return calls. It is an extreme danger with our son driving car. Rear end collison will happpen if this continues.

Filed Jan 11, 2020 · 50 miles · AZ

The fca (forward collision avoidance) system does no work as it should. It does not see vehicles or pedestrians directly in front while not in cruise control. The only time the system alarms is when following a vehicle, which is in the same lane on city streets, and then the target vehicle turns right and creates no hazard. The fca does not work according to what is mentioned in the owners manual, nor does it operate like it is shown in a youtube video sponsored by hyundai.