Your check engine light can come on a host of reasons, ranging from a loose gas cap to a faulty engine component. If you see a light illuminated on your dashboard, you can use an OBD2 scanner to ...

We earn commissions from purchases you make using links in our articles. Learn more. If your car or truck’s check engine light is on, there’s a stumble when accelerating, or if the transmission just ...

In 2026, the gap between professional diagnostics and DIY capability has narrowed significantly, thanks to a new generation of Bluetooth OBD2 scanners and smartphone apps that cost less than a tank of ...