Cadillac DeVille P0307: Misfire Detected → (Cylinder 7)
P0307 is a fairly common trouble code with the Cadillac DeVille. It’s and OBD2 code and means that a misfire has been detected in the 7th cylinder in the firing order. You should only be seeing this code if you have an engine with at least 7 cylinders. So, it’s mostly a code for V8 … Read more