This article was updated in August 2025 with new products and information. That little yellow check-engine light is sneaky. Most of the time, you forget it could be there. But when it detects an issue ...

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 ...

The OBD acronym stands for on-board diagnostics, a system built into modern vehicles that monitors the performance of the engine and other critical components. An OBD system records diagnostic trouble ...

Automotive diagnostics are shifting from basic OBD-II code reading to integrated, AI-enhanced predictive maintenance. Traditional scanners still help identify fault codes, but advances in data logging ...

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 ...

It’s possible to get an OBD2 scanner for over $100, and if you did that it would be money well spent. The best OBD2 scanner can reveal hidden issues, provide live data, and save hundreds if not ...

Add Yahoo as a preferred source to see more of our stories on Google. Modern cars are technological marvels, and understanding what’s happening under the hood has never been more important—or more ...

Everyone knows you probably shouldn't continue to drive your car once a warning light shows up on the dashboard, but many of us continue to anyway. If you don't want to go running to the mechanic ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." The check-engine light suddenly appearing on your dashboard is enough to dampen any drive. For the ...

️ Editor's note: This product category requires new testing about once a year. We'll update this article with the most recent information when it's available. Modern cars are technological marvels, ...