Ok, I would like you to do something for me . ... One, do the datalogging when you are testing your car and report this problem to our server. The datalogging function is the Disc icon on the top of screen.....Two, pls give me your car's model, year, VIN code, and a clear test path as well, so we can duplicate your act in our workshop. Pls send this info to support@auteltech.com.