OBD2 Scanner vs Code Reader — What's the Difference?

Not every plug-in tool is a full scanner. Understanding tiers saves money and prevents wrong-part replacements.

Code readers

Engine OBDII only — TOPDON AL400 and CarPal US fit here.

Enhanced scanners

ABS, SRS, transmission on many cars — AD500, AD600S, ArtiDiag600 Pro.

Bi-directional tools

Command actuators and run dealer-style tests — AD800BT, Phoenix series, TopScan Lite.