2020 Ford Mustang Won't Start

Common Causes for Your 2020 Ford Mustang Not 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 2020 Ford Mustang 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 for a 2020 Ford Mustang that won't start?

When your 2020 Ford Mustang refuses to start, the first step is to check the battery, as a dead or low battery is a common culprit. If the battery seems fine, inspect the fuel level to ensure there’s enough gas in the tank, as running out of fuel can often be overlooked. Next, verify the ignition switch; a malfunction here can prevent the engine from cranking. If these initial checks don’t resolve the issue, examine the starter motor, as a faulty starter can also be a reason for the car not starting. Additionally, using an OBD-II scanner to scan for error codes can provide valuable insights into any underlying problems. Finally, inspect the spark plugs to ensure they are in good condition, as worn or faulty plugs can hinder the ignition process. By following this structured diagnostic approach, you can effectively identify and address the reasons your Mustang won’t start, making the troubleshooting process more manageable.

What are the common problems that could cause a 2020 Ford Mustang to not start?

When troubleshooting a 2020 Ford Mustang that won't start, it's crucial to consider several common problems that could be at play. A dead battery is often the first suspect, as it can result from age, extreme weather conditions, or simply leaving the lights on. If the battery is functioning, the next component to check is the starter motor; a faulty starter can prevent the engine from turning over. Additionally, issues within the fuel system, such as a clogged fuel filter or a failing fuel pump, can hinder the engine's ability to receive the necessary fuel for ignition. It's also important to examine the ignition switch, as a malfunction here can block the starting process when the key is turned. If the alternator is not charging the battery properly, it may lead to starting issues or even cause the vehicle to stall while driving. Furthermore, worn-out or faulty spark plugs can disrupt the ignition process, making it difficult for the engine to start. Lastly, a malfunctioning security system, particularly an immobilizer issue, can prevent the engine from starting altogether. By systematically diagnosing these potential problems, you can effectively identify and resolve the starting issue with your Mustang.

How urgent is it to address the starting issue in a 2020 Ford Mustang?

When dealing with a starting issue in a 2020 Ford Mustang, understanding the urgency of the situation is essential for any DIY enthusiast. The severity of the problem plays a critical role; if the vehicle fails to start entirely, immediate action is necessary to prevent being stranded or causing further damage. Intermittent starting problems, while less urgent, should still be investigated quickly to avoid escalation. Additionally, the presence of warning lights on the dashboard or unusual noises during startup can indicate serious underlying issues that require prompt attention to safeguard the vehicle's integrity. Regular maintenance is key in preventing these problems from becoming more severe, so addressing any starting issues without delay is advisable. By prioritizing these concerns, you not only ensure the safety of your Mustang but also maintain its performance and longevity.

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