Did your vehicle's check-engine light just pop on? An OBD-II scanner can provide some direction. We tested a handful to find ...

The Autel AL319 OBD-II scanner was slow to boot up, slow to read codes, and difficult to navigate. Thanks to a single directional button, churning through the menus takes some practice (and patience).

The Autel AL319 OBD-II scanner was slow to boot up, slow to read codes, and difficult to navigate. Thanks to a single directional button, churning through the menus takes some practice (and patience).

If you decide to use a Wireless Code Reader that uses Bluetooth or Wi-Fi to link to the OBD-II port, you should download a car scanner app.

If you want to see vehicular data through the OBD-II port, you'll want to spend some more. For those interested in cheap scan tools, one of our favorites is on sale right now for over 50 percent off.