The second iteration of on-board diagnostics, OBD II, has been required tech on all new cars sold in the U.S. since 1996. That means that anyone who uses or works on cars less than three decades old ...

Modern OBD2 scanners let drivers and mechanics quickly uncover what’s going on under the hood, from simple check engine codes to complex system data. Whether you’re a DIY car enthusiast or a shop pro, ...