Both code readers and scan tools work with a vehicle’s on-board computer or diagnostic system to identify or fix problems. A code reader is a simplified version of a scan tool, but can only perform basic trouble code scans. A scan tool can read and clear trouble codes, and may also offer advanced data reading and playback functions, knowledge bases, diagnostic procedures, and on-board test equipment.
How to Choose a Car Scanner – Differences in Car Diagnostic Tools
Because they are inexpensive and easy to use, code readers are useful for vehicle owners and mechanics who want to read and clear diagnostic codes. Scan tools are more expensive, but they can do everything a code reader can, plus provide troubleshooting tips, data readouts, and diagnostic equipment.
Professional auto technicians typically require high-quality scan tools to work efficiently, while the average do-it-yourselfer will be fine with an inexpensive code reader or a nearby service willing to read codes for free.
Most people can get by with the free code reading service offered by a local parts store or by searching the Internet to find out what a trouble code means.
