Understanding OBD-II Code Tools: Readers Vs. Scan Tools
What's the Difference Between a Code Reader and a Code Scanner?
There are two tools that help you properly diagnose your vehicle’s OBD-II codes: code readers and scan tools. An OBD-II code reader can read, display, and even clear DTCs and reset the check engine light on your vehicle. It’s a convenient tool for car owners that want to perform these basic functions.
A scan tool, on the other hand, not only reads the codes but provides troubleshooting information and tips on properly diagnosing the issue. Scan tools can also read pending, generic, and manufacturer-specific codes. Some higher-end models can even record and playback live data and graph data and access specific parameter IDs.
Because code readers are simpler devices, they cannot be used on all cars because they don’t have as high of a computing capacity as scan tools do.
