Check engine light on? A word of caution… Recently we have had many customers come to us with a check engine light on and state they went to the local auto parts store and had them scan the computer for free to check for fault codes associated with the check engine light and then sell them a part. The customers installed the part themselves but this did not fix their problem. If only our jobs as a mechanic was that simple! The check engine light comes on because the computer has monitored a problem in one of the many systems that operate your vehicle. When the light comes on the computer stores a fault code. This fault code does not diagnose the problem it only refers to the system that is not operating properly. We must then diagnose that system completely to determine the cause of failure before replacing any parts. A proper diagnosis will tell us if a part has failed, and electrical problem exist or possibly a computer that is failing. DON’T GET SUCKERED INTO SWAPPING PARTS ATTEMPTING TO FIX YOUR PROBLEM. Have your vehicle properly diagnosed by the experts at Scotty’s Transmission & RPM Automotive.