Showerthought: I fought against electronic diagnostics for years, and it was a huge mistake
I was the guy who'd laugh at anyone pulling out a laptop for a simple glow plug issue, insisting you could hear the problem if you just listened. Then I spent three days chasing a phantom misfire on a Duramax that turned out to be a single injector balance rate slightly off spec, something no stethoscope could catch. It cost me a customer and a ton of time, all because I was too proud to plug in the dang computer earlier. Now, I start with the scanner for anything electronic, and my diagnostic time has halved. Funny how stubbornness can blind you to the tools right in front of your face.