According to the web sit it is for "04 and "05 bikes. Probably works on "06 also since it is for bikes with the full serial data bus.
On my "99 it has to be cleared either with 50 starts or with the H-D scanalizer.:badmood: You can read the codes using a jumper in the scanalizer plug, but you can not clear them without the scanalizer. Refer to the service manual, it gives the codes and details on how to read them and what they mean.