Modern cars are basically rolling computer networks. When you only use a basic...

https://dlf-ne.org/beyond-the-code-what-an-advanced-diagnostic-platform-actually-does-for-your-shop/

Modern cars are basically rolling computer networks. When you only use a basic code reader, you’re just seeing the tip of the iceberg. You need OEM-level diagnostic software to talk to every ECU and view live data streams in real time