Shotgun diagnostics, or diagnostics dice, is when someone guesses the cause of a problem, sometimes based on a simple free code check without further testing and analysis. They then replace a part to see if it fixes the problem. In this type of “diagnostics” (if you can call it that), it could be several parts later and still no fix to the original problem. Learn more about automotive diagnostics in our blog post, Are Free (or Cheap) Diagnostics a Myth?.