2017 Infiniti QX80 SERVICE BRAKES,FORWARD COLLISION AVOIDANCE

Automatic emergency braking system phantom braking; Several different times now, on the road; at low speed causing sudden stopping in traffic; after pulling over the emergency stopping system turned off but the transmission locked up in one gear; drive on in a fixed gear and after several miles transmission unlocked and vehicle returned to normal; Have not gone to dealer No components have been inspected; Engine light came on and then later turned off when it began running correctly again. Four or five times in the last 12 months