if you want a guaranteed to read code reader then tech2 would be the one,but depends how many thousands you have to spend,sealey do a code reader,think it is part no vs864 which should do the job also,think they are about the £300 mark then you can get a code reader for about £50 but there will be no guarantees that this will cater for your needs and may be limited to what codes you get out of a motor
cdc, January 2011