OBD2 scanners range from simple code readers that clear the check engine light to professional-grade bidirectional scan tools that can diagnose advanced systems, run tests, and program modules. The right scanner depends on your skill level, what you want to diagnose, and your budget.
This OBD2 Scanners hub brings together BestGearNest’s research-based reviews and buying guides so you can narrow the category by scanner type, features, compatibility, and use case rather than comparing every tool at once.
Our guides are based on current manufacturer specifications, product documentation, construction details, and practical buying considerations. We do not claim hands-on testing unless an article specifically states otherwise.
Explore Our OBD2 Scanner Guides
Best OBD2 Scanners: 6 Picks for Diagnosing Your Car
Start with our broad comparison if you’re still deciding between basic code readers, Bluetooth adapters, and professional scan tools.
Best Bluetooth OBD2 Scanners: 6 Picks for Phone-Based Diagnostics
Compare compact Bluetooth adapters that connect to your phone or tablet for on-the-go diagnostics.
Best OBD2 Code Readers: 6 Picks for Clearing the Check Engine Light
For basic check engine light diagnosis, compare affordable handheld code readers that read and clear trouble codes.
Best Professional OBD2 Scanners: 6 Picks for Advanced Diagnostics
For professional mechanics and serious DIYers, compare advanced scan tools with bidirectional control and full system coverage.
Best Budget OBD2 Scanners: 6 Affordable Picks for Everyday Use
For budget-conscious buyers, compare affordable scanners that read and clear codes and display basic live data.
Best OBD2 Scanners with Live Data: 6 Picks for Real-Time Monitoring
For monitoring engine parameters in real time, compare scanners that display live sensor data like RPM, coolant temp, and MAF.