Why Is My Check Engine Light On? Top 5 Reasons for BMW & Mercedes Owners
If you drive a BMW or Mercedes-Benz, seeing the dreaded check engine light on your dashboard can be stressful. Sometimes it’s something small, but other times it signals a bigger issue that needs attention right away. At Burbank Motor Works, we specialize in European cars and help drivers in Burbank quickly find out what’s really going on.
Why Is My Check Engine Light On? Top 5 Reasons for BMW & Mercedes Owners
If you drive a BMW or Mercedes-Benz, seeing the dreaded check engine light on your dashboard can be stressful. Sometimes it’s something small, but other times it signals a bigger issue that needs attention right away. At Burbank Motor Works, we specialize in European cars and help drivers in Burbank quickly find out what’s really going on.
Here are the top 5 reasons your check engine light might be on:
1. Loose or Faulty Gas Cap
Believe it or not, something as simple as a loose gas cap can trigger the check engine light. If the cap isn’t sealing properly, it can cause fuel vapors to leak and affect the system. Always check this first—it’s the easiest fix.
2. Oxygen Sensor Failure
Your BMW or Mercedes uses oxygen sensors to measure unburned oxygen in the exhaust. If one fails, it can reduce fuel efficiency and damage your catalytic converter over time.
3. Catalytic Converter Problems
The catalytic converter helps reduce harmful emissions. When it fails, your car may run poorly, get worse gas mileage, or even fail a smog test in California.
4. Ignition Coil or Spark Plug Issues
Misfiring spark plugs or failing ignition coils are common in European vehicles. They can cause rough idling, poor performance, or difficulty starting your engine.
5. Mass Air Flow (MAF) Sensor Malfunction
This sensor measures how much air enters the engine so the computer can adjust fuel delivery. When it fails, you may notice sluggish acceleration or stalling.
What Should You Do if the Light Comes On?
If the check engine light is solid, it usually means a minor issue—but don’t ignore it.
If the light is flashing, it signals a serious problem. You should stop driving and get it checked immediately.
Get Professional Diagnostics in Burbank
At Burbank Motor Works, we use advanced diagnostic tools to pinpoint the exact cause of your check engine light. Whether it’s a BMW, Mercedes, or another brand, we’ll give you a clear explanation and a fair repair estimate.
Don’t guess what’s wrong with your car—schedule a diagnostic today with Burbank Motor Works!