2016 BMW 550i GT XDrive Has A Check Engine Light

Common Causes of the Check Engine Light in Your 2016 BMW 550i GT xDrive and How to Resolve Them

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Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
40% chance it's the
Emissions System
0%
60% chance it's
Something else
The most common reasons a 2016 BMW 550i GT xDrive has a check engine light are an emissions system component, a sensor, or a catalytic converter.
  • Emissions System: A faulty emissions system component, such as an oxygen sensor or EGR valve, can lead to increased emissions and trigger the check engine light.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2016 BMW 550i GT xDrive has a check engine light?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

Like we noted in the last section, general diagnosis symptoms are the most vague of the bunch. There are several diagnostic spectrums, electrical diagnosis, drivability diagnostics, engine diagnostics, transmission diagnostics, and the list could continue for about 5 or 10 more spectrums of diagnostics. The most important take-away here, is that general diagnostics are diagnostics that have no other spectrum in which they fit, or the problem is unknown. This means that any vehicle left outside of a repair facility with the keys and an authorization to perform diagnosis will be diagnosed under the general diagnosis spectrum.

When the Check Engine Light comes on, you may experience engine performance issues such as poor acceleration, rough idling, or an engine that won't start. In some cases, no abnormal symptoms will be experienced. Other systems like the transmission or ABS can cause the Check Engine Light to illuminate and lights for those systems can come on at the same time. Similar lights may say "Check Engine Soon", "Malfunction Indicator Light" or just "Check". In rare case the engine can overheat.

What are the initial diagnostic steps to take for a check engine light on a 2016 BMW 550i GT xDrive?

When faced with a check engine light on your 2016 BMW 550i GT xDrive, the first step in your DIY diagnostic approach should be to retrieve the Diagnostic Trouble Codes (DTCs) using an OBD2 scanner. This tool will help you pinpoint the specific sensor or component that is causing the warning light to illuminate. If the light is flashing, it signals a serious issue that requires immediate attention to avoid potential damage to your engine. Understanding the nature of the warning is crucial, as the check engine light serves as a vital communication link between your vehicle's systems and you. Regular maintenance, such as engine tune-ups, can also play a significant role in preventing these alerts from occurring in the first place. If you find the codes confusing or the problem persists after your initial checks, seeking professional assistance is advisable to ensure a thorough diagnosis and repair. By following these steps, you can effectively manage the check engine light and maintain the performance of your BMW.

What common issues trigger the check engine light in a 2016 BMW 550i GT xDrive?

When the check engine light comes on in your 2016 BMW 550i GT xDrive, it can be a source of concern, but understanding the common issues can help you take the right steps. One frequent culprit is a malfunction in the emissions system, which can include components like the oxygen sensor or exhaust gas recirculation valve. Sensor issues are also prevalent; faulty sensors can send incorrect data to the engine control unit, leading to performance problems. Additionally, problems with the catalytic converter can trigger the light, often indicating that it is not effectively converting exhaust gases. Lastly, a simple yet often overlooked issue is a loose or damaged gas cap, which can cause fuel vapors to escape and trigger the warning. Addressing these issues promptly is crucial, as ignoring them could lead to more significant damage and costly repairs down the line. By being aware of these common triggers, you can take proactive measures to diagnose and potentially fix the problem yourself.

How urgent is the check engine light issue in a 2016 BMW 550i GT xDrive?

When the check engine light activates in your 2016 BMW 550i GT xDrive, understanding the urgency of the situation is crucial for any DIY enthusiast. A flashing check engine light is a clear indicator of a serious issue that demands immediate attention, as it can lead to significant engine damage if left unresolved. Even a steady light should not be ignored, as it signals that your vehicle is experiencing problems that could affect its performance and reliability. Common causes for the light include issues like vacuum leaks or faulty spark plugs, which can often be diagnosed with basic tools and knowledge. However, the risks associated with neglecting these symptoms can escalate quickly, potentially resulting in costly repairs or safety hazards. Therefore, it is essential to act promptly by conducting a thorough diagnostic check to identify the root cause of the problem, ensuring that your BMW remains in optimal condition and safe to drive.

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