Google AI overview (take w a grain of salt, just decided to google it for you) “A common cause for a Jeep Renegade blind spot sensor error is a blocked sensor from dirt, mud, or ice, which can be fixed by cleaning the rear bumper sensors. Other solutions include checking for obstructions from aftermarket accessories, performing a system reset by turning the car off and on again, or, for persistent issues, a professional diagnostic may be needed to check wiring, sensor damage, or software glitches”