I am glad that the Taki has served you well. I don't know that there is an easy solution for requiring the computer to read the codes. Other than to try and find machines that don't require that, which are getting more and more difficult to find. The trouble codes should be shown on the display (if I recall correctly), calling the dealer and giving them the code, should help trouble shoot. Perhaps the issue can be addressed without needing the dealer or the system may have to be reset which would require the WN computer, likely depends on the issue. Maybe, negotiating with the dealer on the cost of onsite service calls if required might be an option.