Warnings problems of the 2020 Mazda CX-5

While driving my vehicle the systems sensors are affected by nearby drivers which cause the car to stall in the middle of traffic going between 40 and 75 miles per hour.

Forward braking safety sensor was on transmission after braking check engine light . Was driving car from work it lost all power . And those warning ?? light indicators where on . Car wouldn't go over 15mph . Took vehicle to Mazda and dropped it off as my husband requested information do so . Mazda called say diagnostic saying it needed plugs ,coil packs serpentine belt and adjuster pulleys replacement. I called my husband he's a mechanical engineer he said no way it needs a tune up that early. He requested information go get the car as he flew home from working outta town. We took it to scooter's place certified mechanic in indian head MD . Scooter's place diagnostic scan said completely the opposite. Say it was the cars brain aka cpu send false signals causing misfire to all components of vehicle . He change one spark plug and car ran normal. He told us it wasn't a fix it was cpu and no matter tune up or not . The computer was the issue. I went back to passport Mazda in suitland maryland to give them second opinion issues the gm wouldn't give my money back for false diagnostic readings and refused to listen or hear what I had to say I was to upset to continue and decided to leave . He kept saying he wasn't a technician so he doesn't know but was explaining technician issues that were incorrect I have both diagnostic detail paperwork which I will attach with report.