Driving to a stop red light and when I step on the gas the car won't go it slow on 2003 BMW 525i

After stopping at the red light stepping on the gas when it is green light the car won't move until you keep on stepping on the gas hard. It is going like 10 20 mph then suddenly it will run normal again

Asked by for the 2003 BMW 525i
1 answer
scan codes and post so we can adv