Anytime that your check engine light comes on that means that there is an issue. Your vehicles computer is continuously running tests and if one of those tests fail then it will trigger the light to come on. If it runs the test again and passes then sometimes it will turn the light off. The reason that the light came on to begin with will be stored in the computer so even if the light is not on, we can check to see why it was on. Either way it's good piece of mind to know why it came on and to make sure all of your systems are functioning as they should.
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