2021 Audi S7 Sportback Tire Pressure Warning Light Stays On

Resolve Tire Pressure Warning Light Issues in 2021 Audi S7 Sportback

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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 2021 Audi S7 Sportback 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 2021 Audi S7 Sportback 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 tire pressure monitoring sensor fails, the tire pressure monitoring system control module will recognize a loss in communication and turn on the warning lamp which indicates the failure. This is most often the case. However, the tire pressure monitoring sensor may also fail by reporting incorrect tire pressures. This could cause a flat tire to go unrecognized, or a properly inflated tire to signal a low or high tire pressure warning.

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 of a TPMS control module failure are failing to alert the driver of underinflation or overinflation of one or more tires, failure to communicate with the body control module or TPMS sensors, or erroneously reporting incorrect tire pressure.

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 2021 Audi S7 Sportback?

To effectively diagnose the tire pressure warning light issue in your 2021 Audi S7 Sportback, begin with a thorough check of the tire pressure in all four tires using a reliable tire pressure gauge. It's crucial to ensure that each tire is inflated to the manufacturer's recommended levels, which can typically be found in your owner's manual or on a sticker located inside the driver's door jamb. After confirming the correct pressure, inspect each tire for any visible damage, such as cuts, punctures, or bulges, and look for any foreign objects that may be lodged in the tread. If the tire pressure is correct and the tires appear undamaged, the next step is to reset the tire pressure monitoring system (TPMS), as it may require recalibration after adjustments. Refer to your vehicle's manual for specific instructions on how to perform this reset. If the warning light remains illuminated despite these efforts, it may indicate a more complex issue, such as a faulty sensor within the TPMS. In such cases, seeking assistance from a qualified mechanic or dealership is advisable for a comprehensive diagnosis and repair. By following this systematic approach, you can efficiently address the tire pressure warning light issue and ensure your vehicle's safety and performance.

What could be causing the tire pressure warning light to stay on in a 2021 Audi S7 Sportback?

When the tire pressure warning light remains on in your 2021 Audi S7 Sportback, it can be frustrating, but understanding the common problems can help you troubleshoot effectively. One of the primary culprits is low tire pressure, which is easily rectified by checking and inflating your tires to the manufacturer's recommended levels. If the pressure is adequate, the issue may lie with a faulty tire pressure sensor, which could require replacement or recalibration. Additionally, consider the possibility of dead sensor batteries, as some systems rely on battery-operated sensors that can fail over time. Inspecting the wiring and connections for any damage or loose ends is also crucial, as these can disrupt the signal to the monitoring system. Lastly, if all else fails, the system may need recalibration to ensure it provides accurate readings. By systematically addressing these potential issues, you can often resolve the warning light problem without needing professional assistance. However, if the light persists, consulting a qualified mechanic or Audi service center is advisable for a thorough diagnosis.

How urgent is it to address the tire pressure warning light on my 2021 Audi S7 Sportback?

When the tire pressure warning light illuminates on your 2021 Audi S7 Sportback, it signals an immediate need for attention. Ignoring this warning can compromise your safety, as improper tire pressure significantly impacts vehicle handling and braking capabilities, increasing the risk of accidents. Additionally, driving on underinflated tires can lead to uneven wear, reducing their lifespan and efficiency, which ultimately translates to higher costs for replacements and fuel. The risk of tire damage, including blowouts, escalates with low pressure, particularly when navigating high speeds or rough terrain. For those who enjoy DIY maintenance, regularly checking and adjusting your tire pressure not only enhances your driving experience but also ensures optimal performance and safety. Therefore, addressing the tire pressure warning light without delay is crucial for both your safety and the longevity of your vehicle.

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2021 Audi S7 Sportback Tire Pressure Warning Light Guide