What Does the Check Engine Light Mean?

One of the most customarily misunderstood lights or indicators in your 2018 BMW 4 Series is the check engine light. The check engine light is part of the onboard diagnostics system, and displays in various added ways. It can say "Check Engine", it can be a symbol of an engine, it can even be a combination of both. This light illuminates in either an amber or red color and is part of the diagnostics system found on your vehicle.
Onboard computers increasingly have controlled and monitored vehicle performance since the 80s and do a collection of things for your 2018 BMW 4 Series. Some of these include shifting automatic transmissions controlling engine speed, ignition timing, and implementing stability control, just to name a few. With that being said, the check engine light can mean a variety of distinct things. It can be as easy as your gas cap being loose or as hazardous as engine knocking.
BMW ICOM V2021.01 comes with free software that can solve many diagnostic problems
 
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