2020 Tesla 3 Won't Start

Resolve Starting Issues with Your 2020 Tesla Model 3

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Reviewed by
Devin Cabugcal
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 2020 Tesla 3 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.
  • Alternator: A failing alternator can result in insufficient electrical power, 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 are the initial diagnostic steps to take when a 2020 Tesla 3 won't start?

When your 2020 Tesla Model 3 won't start, it's essential to approach the troubleshooting process systematically to identify and resolve the issue effectively. Start by checking the battery, as a low charge can prevent the vehicle from starting; you can easily monitor the battery level through the dashboard or the Tesla mobile app. Next, inspect the key fob to ensure it has enough battery power and is within range of the vehicle; if you have a spare key fob, try using that to eliminate any fob-related problems. If these initial checks do not resolve the issue, attempt to restart the car by pressing the brake pedal and holding it while pressing the power button. Be vigilant for any error messages displayed on the dashboard, as these can provide critical insights into the problem. Additionally, confirm that the vehicle is in Park or Neutral and that the parking brake is disengaged, as these conditions are necessary for starting the car. If the issue persists, consider performing a soft reboot of the car's computer system, which can often clear minor software glitches that may be hindering the starting process. By following these diagnostic steps, you can effectively troubleshoot the starting issue and potentially resolve it without the need for professional assistance.

What are the common problems that could cause a 2020 Tesla 3 to not start?

When troubleshooting a 2020 Tesla Model 3 that won't start, it's essential to consider several common issues that could be at play. One of the first things to check is the battery; a low or dead battery is often the culprit, which can result from leaving lights on or extreme weather conditions. If the battery seems fine, inspect the key fob, as a malfunction or low battery in the fob can prevent the vehicle from recognizing your access. Additionally, software glitches can occasionally disrupt the starting process, so ensuring that your vehicle's software is up to date or performing a reset may resolve the issue. It's also crucial to verify that the car is adequately charged, as insufficient power will inhibit starting. Lastly, if these steps do not yield results, consider that there may be faulty components within the motor or electrical systems, which may require professional attention. By systematically addressing these potential problems, you can effectively diagnose and potentially resolve the starting issue with your Tesla Model 3.

How urgent is it to address the starting issue in a 2020 Tesla 3 that won't start?

Addressing the starting issue in a 2020 Tesla Model 3 that won't start is of utmost urgency due to several critical factors. First and foremost, a malfunctioning battery is often the culprit behind starting failures, and delaying action can lead to a complete battery drain, necessitating an expensive replacement. Additionally, the vehicle's electrical system may harbor underlying issues that, if left unchecked, could escalate into more severe problems, potentially compromising the vehicle's functionality. Furthermore, modern vehicles like the Tesla Model 3 rely heavily on software, and glitches can disrupt normal operations; timely software updates can often resolve these issues before they worsen. Most importantly, ensuring your vehicle starts reliably is essential for your safety and the safety of others on the road. Ignoring these symptoms not only risks your vehicle's performance but also poses significant safety hazards. Therefore, it is crucial to address any starting issues promptly to maintain the reliability and safety of your Tesla Model 3.

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