Anytime a light pops up on your dashboard, it can trigger feelings of stress and anxiety. You might be worrying if it’s safe to drive your car. Or you could be thinking about costly repair fees.

Whatever the culprit might be behind your illuminated check engine light, it’s always a smart idea to have your BMW checked out by a seasoned specialist, like the auto repair technicians at Arizona Bimmer Motor Werks in Mesa, Arizona.

Here are four common causes we see of illuminated BMW check engine lights.

Loose Gas Cap

Probably one of the simplest reasons for your check engine light to be on is a loose gas cap. If you didn’t fully tighten your cap after filling up at the pump, it could make your check engine light come on. Simply check your gas cap to see if it’s tight. If It’s wiggly, turn it right to tighten it. If your check engine light is still on, you might want to bring your BMW in to get inspected.

Issues with Your Oxygen Sensor

Your BMW’s oxygen sensor closely monitors the exhaust for unburned fuel. This ensures your engine is efficiently working and has the proper fuel-to-air ratio. If this sensor has any issues, your check engine light will come on. If you suspect your oxygen sensor isn’t working, it’s crucial to schedule a service appointment right away. If left unchecked, a faulty oxygen sensor could lead to total engine failure.

Bad Spark Plugs

Another common reason for your BMW check engine light to come on is a problem with its spark plugs. The spark plugs ignite the air-and-fuel solution in your cylinder, allowing your BMW to run. If your spark plugs are failing, your BMW may also misfire or fail to start up altogether.

Failing Catalytic Converter

This essential part of your car’s emissions system decreases the amount of carbon monoxide your BMW releases into the air. If your BMW has racked up a lot of miles on the odometer, your catalytic converter could be clogged.

Get Your Check Engine Light Checked Out

If your check engine light is illuminated, schedule an appointment at Arizona Bimmer Motor Werks in Mesa, Arizona, today. We’ll quickly diagnose and fix the problem. To book your appointment, call our Mesa location at (480) 733-5321, our Scottsdale location at (480) 404-0051 or contact us online today!