![]() To help you better understand what you should do next, we've outlined possible scenarios: The way your check engine light is behaving though can help you determine what might be wrong with your, and the severity of the issue. Our service technicians have the most up-to-date diagnostic equipment that can quickly read BMW OBD codes. No matter the situation, when the check engine light comes on in your BMW, we always suggest stopping by our service center so one of our knowledgeable technicians can properly diagnose and repair your vehicle. What to Do if Your BMW Check Engine Light Comes On A faulty MAF sensor can cause your engine to misfire, ultimately causing poor fuel economy, performance, and potentially more unnecessary damage to your engine. Like the oxygen sensors, the MAF sensor measures the amount of air entering the engine and help ensure the proper air-fuel mixture. Faulty Mass Air Flow Sensor: When exposed to dirty or particle-rich air, the Mass Air Flow (MAF) sensor could fail.An engine with too little fuel is at risk of total engine failure, and an engine with too much fuel will create excessive smoke and odor. A faulty oxygen sensor can cause your vehicle's computer to supply the engine with too much or too little fuel. The oxygen sensor provides vital air-fuel mixture information to the ECU. Faulty Oxygen Sensor: Due to long exposure to hot exhaust gas, your oxygen sensor might need replacing.Faulty spark plugs or spark plug wires can cause your engine to misfire, reducing fuel economy, performance, and even prevent it from running altogether. Your spark plugs create a hot spark that ignites the air-and-fuel mixture in the cylinder, allowing your engine to start and run. ![]()
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