Check Engine Light

The Check Engine Light (CEL) is more commonly known as the Malfunction Indicator Light (MIL) in the professional automotive world.
While it’s often assumed that the MIL is an indication of a major mechanical issue, this isn’t always the case. In fact, it typically means the car's emissions control system is faulty, and the vehicle is polluting the air beyond allowable federal standards.
Here some general rules you can follow to give you an idea of the severity and how to handle issues:
- If a solid yellow MIL has illuminated on the dash, there's no need to panic or pull over immediately.
- However, if the light is "steady flashing" or "solid red" (instead of yellow) while driving, this means your engine really has some serious issues that could cause immediate damage. In this case, it's best to pull over in a safe place and have the vehicle towed to a repair shop for a thorough inspection.
When the MIL illuminates, it is typically best practice not to wait or assume it will just go away. While it may not be something serious, this could eventually turn a minor repair into a major mechanical expense.
If you are experiencing drivability issues along with a MIL, you will want to get it looked at as soon as possible.
Don't confuse the MIL with the maintenance or service light. These lights illuminate when a routine service is due.
While it is tempting to erase the codes to turn off the MIL (and hope it stays away), it is best if you DO NOT ERASE any trouble codes or reset the vehicle computer! The trouble codes provide the technician critical information that is used to diagnose the problem.

What is the "Check Engine" Light?

Other Dashboard Warning Lights

What is the "Check Engine" Light?

Other Dashboard Warning Lights

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