If you’ve been working on and around a single vehicle line as long as I have (Hondas in my case), you’re bound to pick up the subtle nuances that distinguish one vehicle and its systems from the next. Some people call this ‘product knowledge’ and the only way to get it is by piling up years-on-the-job. Over time, your product knowledge can help you recognize those times a vehicle is telling you one thing, but what it says it may be the truth or may be a lie.