Tips

My BMW’s Check Engine Light Is On and it Won’t Turn Off

If your BMW’s check engine light is on steadily, it might be safe to continue to drive your Beemer, but we don’t recommend it here at Eurozone Motors, and you’ll see why below. If your BMW’s check engine light is blinking, do not drive your Beemer. A blinking check engine light is a sign of serious engine trouble. Continuing to drive your BMW could put you and your car at risk. There are many reasons why it has come on. Let’s talk about them.

Bad Oxygen Sensor

The oxygen sensor measures how much oxygen is in your BMW’s exhaust. If it malfunctions, the check engine light will come on because it will send an error code to the engine control module.

Battery Problems

Generally, your battery light will turn on if the battery is having problems, but sometimes, it is illuminated to signal battery or electrical issues underneath the Beemer’s hood.

Faulty Engine Control Module

If the engine control module itself is malfunctioning, your light may come on. Your BMW may also shut off and you won’t be able to get it started again no matter how hard you try.

Fuel Metering Problems

If the Beemer has fuel metering problems, the light might come on. In fact, it will come on for other fuel-related problems, as well, such as a clogged fuel filter or leaking fuel injectors.

Ignition System Problems

Your ignition system includes the starter. If the starter is going bad, the light may come on indicating there is a problem. You will also hear clicking sounds when you turn the key in the BMW’s ignition.

Loose Gas Cap

If you just filled your Beemer and the check engine light came on, pull over to a safe place and check the gas cap. A loose gas cap cannot prevent fuel evaporation, and this will turn it on.

Malfunctioning Evaporative Emission Control System

Also called the EVAP, if your Beemer’s evaporative emission control system is experiencing problems, the check engine light will turn on. This system prevents gas emissions from natural evaporation.

Malfunctioning MAF Sensor

The mass airflow sensor can also send the engine control module an error code if it’s going bad. If it is, you will get a check engine warning and engine performance trouble such as acceleration lag.

Misfiring Spark Plugs

Old and misfiring spark plugs can also cause the engine control module to turn on the check engine light. You may hear and feel your engine misfire, as well, and it will also stall in severe cases.

Transmission Problems

Finally, the transmission can also trigger a check engine warning if it’s having trouble. Other signs of transmission problems include the gears slipping or grinding or transmission fluid leaks.

Eurozone Motors in Burbank, CA, is staffed with BMW experts. Bring your Beemer to our shop if your check engine light is on or make an appointment online.

Photo by BDoty from Getty Images Signature via Canva Pro
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