Plus, it has a more straightforward and standard user operation, meaning it now uses the same OBD-II port, connector, and diagnostic trouble codes for all car makes.

OBDII ports are standard on all cars from the 1996 model year on in the U.S. This allows anyone with a reader to plug in and read any trouble codes the car may be throwing.

When your check engine light comes on, it can be tough to figure out why. Since the mid-'90s, though, most cars are made with OBD ports that make things easier.