Answer: There aren’t any hard and fast rules as to what constitutes a basic and what qualifies as a, but there are a few things that typically set these devices apart. Both devices feature basic code reading and clearing functionality, but that’s often where a code reader’s feature set ends.

Scan tools, on the other hand, may include advanced data reading and playback features, extensive knowledge bases and diagnostic procedures, and even built-in testing equipment. As to whether you need a code reader or a scan tool, neither device is necessarily “better” than the other.

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Code readers are cheap and easy to use, and if all you need to do is read and clear codes, then an. Some really affordable code readers even provide basic access to the full range of parameter IDs (PIDs) that your car’s onboard computer provides, and that can be powerful information if you know what to do with it. Code Readers Vs. Scan Tools Code readers are the most basic computer diagnostic tools that you’ll find, and they provide a pretty basic way of interacting with your car’s onboard computer.

If you only need to read and clear codes, then a code reader will do the trick. Of course, a lot of parts stores and shops will actually check and clear your codes for free, so a lot of folks who would do fine with a bargain basement code reader would actually be better off looking into that sort of service. Typical Code Reader Features No two code readers are exactly alike, and feature sets can differ from one model to another. In general, there are some things every code reader can do, other functions that you should be on the lookout for, and a lot of stuff that no inexpensive code reader will be able to handle.

Things a code reader can do. • Read and display codes. • ​Clear codes and reset the check engine light. Things a code reader may be able to do: • Display trouble code names. • Read and display live data. • Display freeze frame data.