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Why Is My BMW’s Check Engine Light On?

The check engine light is a way for your BMW to tell you that your vehicle is dealing with an internal issue, related to the engine. In some cases, it may mean outright engine failure. There are A LOT of reasons why this warning symbol may come on. Some are fixable with a small repair or replacement, while others can mean having to replace your engine.


Read on to learn more about the top 3 common reasons why BMW check engine light comes on:

Loose or Damaged Gas Cap

Something as easy as forgetting to twist on your gas cap can cause this light to trigger on. The vehicle’s gas cap can deteriorate over time, so it doesn’t come as a surprise if you have to change it out later on in your BMW’s life. If your gas cap is not in the best shape, we can replace it right here at Romay’s Auto Service. 

Worn Spark Plugs

Spark plugs are essential to your engine’s operation. This small component allows the small spark of electricity to occur to ignite the fuel and air mixture. Spark plugs need to be precise to ensure smooth motor operation. When they are worn out, your check engine light will come on your BMW’s dash. You may also experience a drop in fuel economy and slower acceleration.

Bad Oxygen Sensor

There are various sensors that relay information to and from your engine. When sensors are broken or misread components, they can cause your check engine light to come on. If your car is running the same as usual, it may be a problem with the sensor itself. However, deeper repairs may be needed if your engine isn’t receiving an adequate amount of oxygen. Either way, you should bring your BMW to Romay’s Auto Service for diagnostics ASAP.


Our auto service shop is one of the most trusted BMW repair shops in the area. Please give us a call or visit if you need check engine light diagnostics today.

2830 Cimarron Blvd Corpus Christi, TX, 78414 (361) 991-4665
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