Gone are the days when you could fix every car with a wrench and a test light....

https://medium.com/@rachel-huang00/my-scan-tool-will-not-access-abs-or-airbag-modules-ff8c3bc396ea

Gone are the days when you could fix every car with a wrench and a test light. Today’s vehicles are networks of interacting ECUs that control everything from your fuel trim to your door locks