: Once the original file is saved, it can be modified (for power, fuel economy, or EGR/DPF deletes) and then "written" back to the vehicle using the same OBD2 connection. Best Practices for Tuning
Next came the "Read." This was the slow part. He clicked the button and watched the progress bar creep across the screen. 1%... 5%... The radiator fans kicked on high, a common quirk during the read process that always made his heart skip a beat. kess v2 tutorial