The world of car diagnostics has changed a lot over the last 50 years. Back in the '70s and earlier, a mechanic's most valuable diagnostic tools were usually their eyes and ears. You could figure out ...

Your car’s OBD-II system is like a built-in health monitor, storing trouble codes when something’s wrong. Learning to read these codes helps you decide whether to keep driving or head straight to a ...

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 ...

Modern cars are basically computers on wheels. With so many electrical systems, sensors, and motors, there’s so much that could potentially go wrong. When something does go awry, pinpointing the ...