Are used car dealerships within their rights to prevent you from using a scan tool to inspect their used cars before buying one, or is this a red flag you should pay attention to?

Autoblog aims to feature only the best products and services. If you buy something via one of our links, we may earn a commission. An OBD2 scanner is the secret weapon of the modern mechanic.

provides extended information from the car’s Engine Control Unit (ECU). The OBD port is most commonly used to diagnose issues with your vehicle (like a faulty sensor or misfire), provide ...