2020 Audi S5 Won't Start

Essential Troubleshooting Steps and Common Causes for Your 2020 Audi S5's Starting Issues

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Reviewed by
Bo Fader
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 Audi S5 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 Audi S5 that won't start?

When your 2020 Audi S5 refuses to start, it's essential to adopt a methodical diagnostic approach to identify the root cause efficiently. Begin by checking the battery, as a weak or dead battery is often the most common culprit behind starting issues. Ensure that the battery is fully charged and that the terminals are clean and securely connected. Next, verify the fuel level in the tank; sometimes, a simple oversight like running low on fuel can lead to starting problems. If the battery and fuel levels are adequate, proceed to inspect the ignition switch, as a malfunction here can prevent the vehicle from starting altogether. Additionally, examine the starter motor to confirm it engages when you attempt to start the car, as a faulty starter can also be a significant issue. To gain further insights, utilize a diagnostic scanner to check for any error codes that may indicate underlying problems within the vehicle's computer system. Lastly, don't forget to inspect the fuses related to the starting system, as a blown fuse can disrupt the entire starting process. By following this structured approach, you can effectively narrow down the potential causes of your Audi S5's starting issues and take the necessary steps to resolve them.

What are the common problems that could cause a 2020 Audi S5 to not start?

When your 2020 Audi S5 refuses to start, it can be frustrating, but understanding the common problems can help you troubleshoot effectively. One of the first things to check is the battery, as a weak or dead battery is often the culprit behind starting issues. If the battery is old or not holding a charge, it may need replacement. Next, consider the starter motor; if it’s malfunctioning, the engine won’t turn over when you attempt to start the car. Additionally, the fuel system plays a crucial role in starting your vehicle; a clogged fuel filter or a faulty fuel pump can prevent fuel from reaching the engine, making it impossible to start. The ignition switch is another critical component; if it’s defective, it won’t send power to the starter, leading to starting failures. Don’t overlook the spark plugs, as worn or faulty plugs can hinder ignition and cause starting difficulties. Lastly, issues with the Engine Control Module (ECM) can also disrupt the starting process, as it manages various engine functions. By systematically checking these components, you can identify and resolve the starting issues with your Audi S5, ensuring a smoother driving experience.

How urgent is it to address the starting issue in a 2020 Audi S5?

When dealing with starting issues in a 2020 Audi S5, the urgency of the situation cannot be overstated. If your vehicle fails to start entirely, immediate action is essential to prevent being stranded and to avoid exacerbating the problem, which could lead to costly repairs. Additionally, the presence of warning lights, such as the check engine light, signals that there may be underlying issues that could cause further damage if left unaddressed. Even intermittent starting problems should not be ignored, as they can escalate into more severe and consistent failures over time. For those who are considering a DIY approach, it is wise to seek a professional diagnosis if the symptoms persist, as this can help identify safety risks and prevent potential damage to the engine or electrical systems. Ultimately, addressing starting issues promptly not only ensures the safety and reliability of your Audi S5 but also protects your investment in the long run.

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2020 Audi S5 Won't Start? Common Causes & Repair Costs