I just bought a Peake code reader and reset tool and have 3 code I am looking for information on if anyone can help me out. I have a 1999 Z3 2.8 and the three thing I need info on are. 1) Brakelight switch/ brake light test??? 2) Motorized throttle valve / feedback ??? 3)Secondary air system too low Cyl. # 4 - # 6 ???