2015 Tesla S Has A Check Engine Light

Troubleshooting the Check Engine Light in Your 2015 Tesla S: Common Causes and Solutions

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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 2015 Tesla S 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 2015 Tesla S 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 2015 Tesla S?

When faced with a check engine light on your 2015 Tesla Model S, it's essential to approach the situation methodically to identify the issue effectively. Start by checking for any immediate concerns such as unusual noises, smells, or performance issues that could indicate a more serious problem. Next, inspect the gas cap; a loose or improperly sealed gas cap is a common culprit that can easily trigger the check engine light. After that, take a moment to review your dashboard for any additional alerts or warning lights that may provide further insight into the issue. Utilizing an OBD-II scanner is a crucial step, as it allows you to retrieve specific error codes from the vehicle's computer system, which can guide your troubleshooting efforts. Be sure to consult your owner's manual for detailed explanations of these codes and recommended actions. Finally, monitor your vehicle's performance closely, as any changes could signal the need for more in-depth diagnostics or professional assistance. By following these initial steps, you can effectively narrow down the potential causes of the check engine light and take informed action to resolve the issue.

What are the common problems that could cause the check engine light to illuminate in a 2015 Tesla S?

When the check engine light comes on in a 2015 Tesla Model S, it can indicate several underlying issues that are crucial for DIY enthusiasts to recognize. One of the primary concerns is battery-related problems, which may stem from low voltage or a faulty battery pack, potentially affecting the vehicle's performance. Additionally, a malfunctioning charging system, including issues with the charger or charging port, can also trigger this warning light. Software glitches are another common culprit, as bugs in the onboard computer systems can lead to erroneous alerts. Furthermore, malfunctioning sensors related to the powertrain or emissions system may cause the check engine light to illuminate, signaling the need for further investigation. Lastly, faulty components such as the motor or inverter can contribute to this issue. Addressing these problems promptly is essential for maintaining the vehicle's optimal performance and safety, and while some issues may be manageable for a DIYer, others may require professional diagnostics to ensure a thorough resolution.

How urgent is it to address the check engine light in a 2015 Tesla S?

When the check engine light illuminates in a 2015 Tesla Model S, it is essential to recognize the urgency of the situation. This warning light is not merely a nuisance; it indicates potential issues within critical systems such as the electric drivetrain or battery management. Ignoring this signal can lead to more severe complications, including costly repairs or even a breakdown, which can compromise both safety and performance. For DIY enthusiasts, it is crucial to understand that while some minor issues may be manageable at home, many problems indicated by the check engine light require specialized knowledge and tools to diagnose accurately. Therefore, addressing the check engine light promptly not only helps in identifying and resolving underlying issues but also prevents further damage to the vehicle, ensuring it remains safe and efficient on the road. If you're unsure about the cause, consulting with a certified Tesla technician is advisable to avoid exacerbating the problem.

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2015 Tesla Model S Check Engine Light Causes & Solutions