Hi, Maxisys can not erase active codes. If codes are active, please fix physical faults in vehicle first.

 If you have high speed internet in your shop. Search You tube ? I can't see why you can't join IATN  and pay for the higher level of membership and access it on the web off your MaxiSys .If you got the money Identifix I heard is a good  subscription web based  program too you  can access off MaxiSys (at least in North America)
https://www.youtube.com/watch?v=ixNGl2N33U0

 Or get your self All Data Program Or Auto Data..................

http://www.alldata.com/

http://www.autodata.com.au/

https://www.autodata-group.com/uk/