Question: What’s the difference between a code reader and a scan tool? I’ve been around cars since I was a kid, but all of this computer stuff is completely foreign to me. I picked up a cheap “code reader” a little while ago so I could start working on my own stuff again, but I don’t think it’s capable of doing what I need it to do. What’s the difference between a code reader and a scan tool, anyway? Which one is better, and which one should I have bought? Answer: There aren’t any hard and fast rules as to what constitutes a basic car code reader and what qualifies as a scan tool, 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