“Bi-directional” means it can both read data from your car and send commands back to it. In other words, it can talk to your car and make it perform specific actions. Think of it as having a two-way conversation with your car’s computer, rather than just listening to what it has to say.
Check out the best Bi-Directional scanners HERE (Amazon)
I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko