2016 BMW I8 Has A Check Engine Light

Common Causes of the Check Engine Light in Your 2016 BMW i8 and How to Resolve Them

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Reviewed by
Devin Cabugcal
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 i8 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 i8 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.

A faulty oxygen sensor is one of the most common causes of a check engine light. Symptoms may include a decrease in fuel mileage, hesitation or misfiring from the engine, rough idling or even stalling. A faulty sensor may cause the vehicle to fail an emissions test.

Any time there is an emissions fault the check engine light will be displayed. The purpose of the check engine light is to inform the driver that an emission related fault has been found, and that there are on-board diagnostic (OBD) trouble codes stored in the powertrain or engine control module. Additionally, since the emissions systems are so intertwined into engine control and transmission control systems, symptoms may include nearly any sort of drivability concerns. This may include harsh shifting, failure to shift, hesitation on acceleration, jerking, engine failure to start or run, loss of power, or any number of other drivability issues.

Due to the nature of electrical systems on modern vehicles, the range of problems these can cause are nearly limitless. However, there is a way to categorize them in two ways. Permanent and intermittent problems. Permanent problems appear and remain. This may be the vehicle will not start, the radio does not work, or the door chime will not turn off among many, many others. These problems are more straight-forward to diagnose since they present themselves at all time. This means there will always be a fault to find. Intermittent electrical problems, however, can be difficult or impossible to locate, since they appear then disappear without warning. The best case scenario for an intermittent issue is when replicating the problem is easily accomplished and understood. This allows a technician to make an issue semi-permanent, allowing them to find the fault. Other issues that come and go without warning and cannot be replicated on demand must occur when the technician is servicing the vehicle, otherwise there is no problem to correct. It is most important to understand that electrical system faults always require inspection, and can include the vehicle working in any manner, or not working at all.

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 i8?

When faced with a check engine light on your 2016 BMW i8, the first step in your DIY diagnostic approach should be to retrieve the Diagnostic Trouble Codes (DTCs) using an OBD2 scanner tool. This device will provide you with specific codes that indicate which sensor or component may be malfunctioning. Once you have the codes, it’s essential to check for common issues that could be causing the light to illuminate, such as a loose gas cap or problems with the oxygen sensor. These are often straightforward fixes that can save you time and money. If the codes point to more complex issues or if you’re unsure about the next steps, it’s wise to consult with service experts who can provide further assistance. By following this structured approach, you can effectively diagnose and address the check engine light issue, ensuring your BMW i8 runs smoothly.

What are the common problems that could cause the check engine light to activate in a 2016 BMW i8?

When the check engine light comes on in your 2016 BMW i8, it can be concerning, but understanding the common problems can empower you to take action. One of the simplest issues to check is the gas cap; a loose, broken, or missing cap is often the culprit and can be easily fixed. If the gas cap is secure, consider inspecting the electrical system, as sensor malfunctions or wiring issues can also trigger the light. Additionally, faulty spark plugs, ignition coils, or spark plug wires may disrupt the engine's combustion process, leading to the light's activation. It's crucial to pay attention to the various sensors in your vehicle, as their proper functioning is vital for optimal performance. Ignoring the check engine light can lead to more severe problems, so addressing these common issues promptly can save you time and money in the long run. By being proactive and investigating these potential causes, you can maintain your BMW i8's performance and reliability.

What are the potential risks of ignoring the check engine light on a 2016 BMW i8?

Ignoring the check engine light on your 2016 BMW i8 can lead to serious repercussions that extend beyond mere inconvenience. The warning light serves as an early indicator of potential engine problems, and neglecting it can result in significant engine damage, which may require extensive repairs or even a complete engine replacement. Additionally, failing to address the underlying issues can lead to decreased fuel efficiency, ultimately costing you more at the pump over time. The longer you wait to investigate the cause of the warning light, the more likely you are to face costly repairs down the line, as minor issues can escalate into major problems if left unattended. Moreover, there are safety concerns to consider; a malfunctioning engine can compromise your vehicle's performance, putting you and others at risk on the road. Therefore, it is crucial to take the check engine light seriously and act promptly to diagnose and resolve any issues, ensuring the safety, efficiency, and longevity of your BMW i8.

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