Review on CARXtruck Y10 Universal OBD2 Scanner: Read, Clear Codes & Get Real-time Vehicle Data Flow by Justin Reese

Firstly I have no real way of knowing if the OBD engine codes are accurate, but for RPM and speed it's very good. The instructions are fine, but once you plug it in and run it, clicking is easy. Read the manual, it's not entirely clear that clearing the codes will remove them from the car. The contrast setting was good. The hardest part is finding the connector on your vehicle. Every car made in the last 20 years will have a port. I tried 2 machines and they worked great on both machines. $20 and you can read the error code. You can't go wrong here.