Launch Tech 301050099 CReader VI Plus Diagnostic Tool The easy to read color screen can display up to 4 data graphs at the same time and the fast refresh rate of 2 frames/second means that no problem will go unnoticed The ability to record and playback hours of diagnostic data gives the CReader VI a unique advantage This function allows you to re-asses diagnostic data again and again even when the vehicle is not present The I/M readiness test shows whether the various emissions related systems on the vehicle are operating properly and are ready for inspection and maintenance testing The Launch CReader VI also reports the saved values of various engine components when the fault was flagged