NHTSA Complaint #11500920 — 2018 INFINITI Q60

Something is malfunctioning in the steering of this car...About a month ago I was driving my car and noticed it would not accelerate, it kept stalling but not shutting off, as well as it was swerving on it's own with the slightest bumps in the road, and I am not able to control the steerring. I called the service dept. at Colter Infiniti in Mesa Az where I purchased it and they towed it to their service center. They said that the battery was dead which caused the CAMS malfunction, they replaced the battery(infiniti battery) fixed the CAMS and I picked up my car. At first it seemed to function normally, the next day I drove to work and noticed it still swerving whenever I would drive on any uneven pavement or try to switch lanes and have to cross over any bumps, the car will oversteer. This happens at speeds higher than 35-40 mph however, It happens under 35-40, but is controllable... I also took it to another Infiniti dealer Infiniti on Camelback, and they checked everything and said I should lower the tire pressure, I lowered them to 31(35 is recommended) and it still continues. I have checked car forums and they are saying it could be the Direct Adaptive Steering(DAS) , I asked the service department at Camelback to check that and they said they ran all tests and couldn't find a fault. No warning lights or codes come on, and dealer can't find the fault. I believe this issue is a computer failure and it will not throw a code since it is not a part or mechanical issue, it is computer issue. I also asked them to reset my computer and they said that wasn't necessary. I have reported this issue with Infiniti Consumer Affairs, I feel this car is a danger if i drive faster than 35-40 mph as it becomes uncontrollable.