The Autel MaxiScan MS300, Innova 3100 and ScanTool OBDLink SX are some of the best OBD code readers, according to EZVid. Other quality models include the Innova 3040 and Innova 3030.
The Autel MaxiScan MS300 is considered to be cost-effective, durable and reliable. It has a large, easy-to-read display screen and includes a vast library of diagnostic codes from several automobile manufacturers. The Innova 3100, in addition to these features, offers a battery pack, allowing users to access codes after disconnecting the reader from the vehicle. The ScanTool OBDLink SX turns any Windows computer into an OBD code reader. It includes an extensive code database and comes with a free software download code.