Monthly Archives: May 2017

Why is my “CHECK ENGINE” light on?

Why is my “CHECK ENGINE” light on?

Why is my “CHECK ENGINE” light on? “Why is my check engine light on?” I get this question almost daily. Since 1979, manufactures have put computers in cars, but still, every day, I'm asked to explain why a check engine (CE) light comes on. It’s a simple question, but requires a complex and lengthy answer however, we don't have time for that, so I'm going to try and make it a little easier to understand. I could write paragraphs of technical jargon, but in the simplest terms; Your car has a computer – actually, it has many…upwards of 20 or more. Your computer has one single way of letting you know how it’s feeling. We call it; the “Check Engine” (CE) light. If the light is off – the computer is happy (for the moment). If the light is on – the computer is unhappy (for the moment).   Not all CE light look exactly like this one, but this is the most common design.   ... read more

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