A true tech doing his Job properly and thourghly diagnosing the problem whatever it may be catastrophic or not Will find with out to much trying that it's been tuned. The tech Will want to be able to answer the owners quesiton as to what and why whatever failed. Anyone that puts the money into their truck to keep it running Will ask the tech. Everytime. The tech is Going to see the freezeframe data and almost Guess correctly a real tech wants to keep his cuatomers happy so when SHTF and problems arise that the customer comes back to them it's better to speak to the tech than the advisor that has no clue and advisor blow smoke to upsale. True techs áre generally honest and care