Why is my check engine light on?

Have you ever had somebody tell you “don’t worry about that light”?  I am here to tell you they are wrong.  The check engine light is also known as a malfunction indicator light (MIL for short), and it means the engine computer has seen a fault in your vehicle systems.  There are literally thousands of reasons a check engine light will come on.  Yes, some malfunctions are more detrimental than others but they are all important for a safe, reliable, and efficient running engine. 

Another misconception about check engine lights is that the engine computer will tell you what is wrong with the vehicle.  It only tells the mechanic that a malfunction has occurred in a specific system.  An example would be a P0401 EGR system insufficient flow malfunction.  This code could be caused by a faulty EGR valve, a clogged EGR passage, and/or a failed sensor.

The moral of the story is that amputation before diagnosis only leads to malpractice.  Get the proper tests done to determine the cause of your light and don’t waste your money on parts that may not need to be changed.

#Check engine light #Auto repair