If not, try again from step 2. How To Reset a Check Engine Light by Turning it On and Off Again, Step by Step Here’s what can happen when you ignore your check engine light. Depositphotos ...

With a code reader you might find you can simply turn off the check engine light yourself. However, if you haven’t fixed the problem, it will eventually come on again.

Your Check Engine light is shining like a beacon of bad news. What's going on? The car still runs well and idles fine. Maybe it's an electrical snafu. It's sure to turn itself off at some point ...