2015 Tesla S Won't Start

Troubleshooting Common Issues That Prevent Your 2015 Tesla S from Starting and How to Resolve Them

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
38% chance it's the
Battery
0%
27% chance it's the
Alternator
0%
20% chance it's the
Starter
0%
15% chance it's
Something else
The most common reasons a 2015 Tesla S won't start are a dead battery, an alternator problem, or failed starter.
  • Battery: A weak or failing battery can result in difficulty starting the engine and electrical system malfunctions due to insufficient power supply.
  • Alternator: A failing alternator can result in insufficient electrical power to the vehicle, leading to battery drain and electrical system malfunctions.
  • Starter: A faulty starter motor or a weak battery can prevent the engine from cranking properly, leading to starting issues.
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.

What steps should I take to diagnose why my 2015 Tesla S won't start?

When your 2015 Tesla Model S won't start, it's crucial to follow a methodical diagnostic approach to pinpoint the issue effectively. Start by checking the battery charge level, as a low battery is often the most common reason for starting problems. If the battery is adequately charged, examine the key fob and smartphone app for any connectivity issues, as these can prevent the vehicle from starting. If these preliminary checks do not resolve the problem, consider the possibility of software glitches affecting the vehicle's functionality. Performing a soft reboot of the touchscreen or a full vehicle reset can often fix minor software-related issues. If the car still fails to start, using specialized diagnostic tools, like the YOUCANIC scanner, can help uncover deeper problems, especially if your Tesla is out of warranty. For more complicated issues, particularly those involving sensors or complex systems, it is wise to consult a certified Tesla technician to ensure an accurate diagnosis and appropriate repairs. By following this structured approach, you can effectively troubleshoot and resolve the starting issue with your Tesla Model S.

What are the common problems that could cause a 2015 Tesla S to not start?

When your 2015 Tesla Model S refuses to start, it can be frustrating, but understanding the common problems can help you diagnose the issue. One of the most frequent culprits is a low or dead 12V battery, which can prevent the vehicle from powering on. Additionally, a blank touchscreen display may indicate a software glitch or battery issue, as the system relies on this interface for operation. Key fob problems, such as a dead battery or connectivity issues, can also hinder your ability to unlock and start the car. If the main battery charge is low, it may not provide enough power to start the vehicle, so checking the charge level is essential. Furthermore, ensure that the car is in the correct parking position, as being in gear can prevent starting. By systematically checking these areas, you can often identify the root cause of the starting issue and take appropriate steps to resolve it, whether through simple fixes or seeking professional help.

How urgent is it to diagnose and fix the starting issue in a 2015 Tesla S that won't start?

When faced with a starting issue in a 2015 Tesla Model S, the urgency to diagnose and resolve the problem cannot be overstated. A vehicle that fails to start poses significant safety risks, particularly if you find yourself stranded in an unsafe location or during inclement weather. The inconvenience of a non-starting car can disrupt your daily life, making it essential to address the issue promptly to restore your mobility. Moreover, neglecting the symptoms of a starting problem can lead to more severe complications, potentially damaging other vehicle components and escalating repair costs. While some initial troubleshooting can be performed at home, it is crucial to seek professional assistance for an accurate diagnosis. Tesla service centers possess the specialized knowledge and tools necessary to pinpoint the root cause of the issue, ensuring that any underlying problems, such as battery health, are thoroughly evaluated. In summary, prioritizing the diagnosis and repair of a starting issue in your Tesla Model S is vital for your safety, convenience, and the long-term health of your vehicle.

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Common Causes for 2015 Tesla Model S Won't Start