KTuner.com

I have a 2018 Civic Si. The vehicle was tuned a month ago and everything was running great. However, a few days ago, I started getting a list of errors as I was driving, similar to when the car is going through the tuning process. I pulled over and shut the car down and let it sit a few minutes. When I started the car again, the errors were gone. It did this again yesterday, so today, I returned to factory. Has anyone had something similar happen or I am just lucky?

If you had an active error code the only way to figure out what code it was is to check error codes.