2020 Audi S4 Tire Pressure Warning Light Stays On

Resolve Persistent Tire Pressure Warning Light in 2020 Audi S4

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Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
40% chance it's the
Tire Leaking Air
0%
30% chance it's the
Wheel Leaking Air
0%
15% chance it's the
Tire Pressure Monitoring System
0%
15% chance it's
Something else
The most common reasons a 2020 Audi S4 tire pressure warning light stays on are a leaking tire, a wheel that no longer holds air, or a faulty tire pressure monitoring system.
  • Tire Leaking Air: A puncture, valve stem issue, or rim damage can cause a tire to leak air, leading to loss of pressure.
  • Wheel Leaking Air: A puncture or damage to the tire or rim can cause air to leak, resulting in a loss of tire pressure.
  • Tire Pressure Monitoring System: A malfunctioning tire pressure monitoring system can be caused by faulty sensors or a dead battery in the sensor units.
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 2020 Audi S4 tire pressure warning light stays on?

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.

When a relearn is needed, for any reason, the TPMS warning light will illuminate, and many vehicles will display a message relating to the TPMS system being inoperative or loosing communication. It is important to keep a watchful eye on tire pressures when this system is having issues because there is no warning available for underinflation or overinflation of the tires.

Wheels offer very few symptoms, but these symptoms should never be ignored. Visible cracks on the wheels may appear, especially after hitting a large bump, Most often, this will also be accompanied by loss of air from the tire on that wheel. Also, vibration in the steering wheel is very common when the tire is out of balance, and improper wheel nuts or bolts can cause creaking and popping noises to develop. Again, there are very few symptoms, but they should not be ignored.

The only symptoms requiring diagnosis for the tire pressure monitoring system warning lamp is if the warning lamp has illuminated while the tires have correct air pressure, or if the air pressure for the tires is out of specification and the warning lamp is off. This is because the overwhelming majority of cases where the TPMS lamp illuminates is due to the change in ambient temperature.

What steps should I take to diagnose the tire pressure warning light issue in my 2020 Audi S4?

To effectively diagnose the tire pressure warning light issue in your 2020 Audi S4, begin with a straightforward approach that prioritizes simpler checks before delving into more complex diagnostics. Start by manually checking the tire pressure in all four tires using a reliable tire pressure gauge, ensuring that the readings align with the recommended levels found in your vehicle's manual. Next, conduct a visual inspection of the tires for any signs of damage, such as punctures or bulges, which could indicate a loss of pressure. Don’t overlook the valve stems; inspect them for any leaks or damage that might contribute to the problem. If these initial checks do not resolve the warning light, utilize an OBD-II scanner to identify any fault codes related to the tire pressure monitoring system (TPMS), as this can provide insight into the underlying issue. In some cases, simply resetting the TPMS may clear the warning light, so refer to your manual for the reset procedure. If the problem persists after these steps, it may be time to consult a certified mechanic for a professional diagnosis, ensuring that your Audi S4 remains safe and roadworthy.

What could be causing the tire pressure warning light to stay on in a 2020 Audi S4?

When the tire pressure warning light remains illuminated in a 2020 Audi S4, it can be attributed to several common problems that DIYers can investigate. First and foremost, low tire pressure is the most frequent culprit; checking and inflating each tire to the manufacturer's recommended levels is a straightforward task that can often resolve the issue. If the tire pressure is adequate, the next step is to consider the possibility of a faulty tire pressure sensor, which may require replacement if it is malfunctioning. Additionally, sensor calibration issues can arise, necessitating a recalibration process that can typically be performed at home with the right tools or by a professional. Electrical faults within the tire pressure monitoring system can also lead to persistent warning lights, and while diagnosing these issues may be more complex, checking for loose connections can be a good starting point. Furthermore, inspecting the tires for slow leaks is essential, as even minor punctures can cause gradual pressure loss. Lastly, be mindful of extreme temperature changes, as they can significantly impact tire pressure; adjusting your tire pressure accordingly can help mitigate this problem. If these troubleshooting steps do not resolve the warning light issue, seeking assistance from a certified mechanic or Audi dealership is advisable for a thorough diagnosis.

What should I do if the tire pressure warning light on my 2020 Audi S4 stays on?

If the tire pressure warning light on your 2020 Audi S4 stays illuminated, it is essential to take immediate action to ensure your safety and prevent further complications. Neglecting this warning can lead to dangerous driving conditions, including decreased traction and increased tire wear, which may result in expensive repairs down the line. Begin by checking the tire pressure of all four tires using a reliable gauge, making sure they are inflated to the specifications outlined in your owner's manual. If you find any tires are underinflated, inflate them to the correct levels to potentially resolve the warning light issue. Additionally, conduct a thorough inspection of each tire for any signs of damage, such as punctures or bulges, as these can significantly affect your vehicle's performance and safety. Once you have made the necessary adjustments, you may need to reset the tire pressure monitoring system, which can usually be done by following the instructions provided in your manual. If the warning light remains on after these steps, it is wise to seek assistance from a mechanic or an authorized Audi service center to identify any underlying problems. By addressing the tire pressure warning light promptly, you not only enhance your driving safety but also contribute to the overall health and longevity of your vehicle.

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