2021 Audi E-tron Quattro Tire Pressure Warning Light Stays On

Addressing Tire Pressure Warning Light in 2021 Audi e-tron Quattro

Find Repair Location
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 e-tron Quattro 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 e-tron Quattro 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 on my 2021 Audi e-tron Quattro?

To effectively diagnose the tire pressure warning light issue on your 2021 Audi e-tron Quattro, start with the simplest solutions before moving on to more complex diagnostics. Begin by manually checking the tire pressure using a reliable tire pressure gauge, ensuring that all tires, including the spare, are at the recommended levels specified in your owner's manual. Next, inspect each tire for visible damage such as punctures, cuts, or bulges that could indicate a loss of pressure. Don’t forget to examine the valve stems for any signs of damage, as these can also contribute to pressure issues. If everything appears intact, conduct a thorough visual inspection for leaks, listening for any hissing sounds that might suggest air escaping. If the tire pressure is correct and no physical issues are found, attempt to reset the Tire Pressure Monitoring System (TPMS) following the manufacturer’s guidelines. Should the warning light remain illuminated despite these efforts, it may be time to consult a professional mechanic or an authorized Audi service center for a more detailed diagnosis and repair. By following this structured approach, you can efficiently identify and address the tire pressure warning light issue, ensuring your vehicle's safety and performance.

What could cause the tire pressure warning light to stay on in a 2021 Audi e-tron Quattro?

When the tire pressure warning light stays on in your 2021 Audi e-tron Quattro, it’s important to identify the underlying issues to ensure your vehicle's safety and performance. The most common reason for this warning is low tire pressure, which can result from natural air loss or changes in temperature. Regularly checking and maintaining the correct tire pressure is vital. Another potential cause could be a faulty tire pressure sensor, which may not provide accurate readings, indicating the need for inspection or replacement. Additionally, sensor calibration issues can arise, requiring a reset to ensure proper functionality. It's also wise to examine the vehicle's electrical system for any wiring problems that could interfere with the tire pressure monitoring system. Lastly, inspect your tires for any physical damage, such as punctures or leaks, which can lead to pressure loss. By addressing these common problems, you can effectively troubleshoot the persistent warning light and maintain the safety and reliability of your Audi e-tron Quattro.

What immediate actions should be taken if the tire pressure warning light remains on in a 2021 Audi e-tron Quattro?

When the tire pressure warning light remains illuminated in your 2021 Audi e-tron Quattro, it is crucial to act swiftly to avoid serious safety hazards and potential vehicle damage. Ignoring this warning can lead to compromised handling, increased tire wear, and even blowouts, which pose significant risks on the road. Start by checking the tire pressure in all four tires with a reliable gauge, ensuring they meet the manufacturer's specifications. If you find any tires underinflated, use a quality air compressor to inflate them to the correct levels. Next, visually inspect each tire for any signs of damage, such as punctures or bulges, as these issues may necessitate tire replacement. After addressing the tire pressure and any visible damage, you may need to reset the tire pressure monitoring system, which can typically be done through the vehicle's infotainment system or by following the owner's manual instructions. If the warning light persists despite these efforts, it is essential to consult a qualified mechanic or Audi service center, as there may be a deeper issue with the monitoring system that requires professional intervention. Taking these steps not only ensures your safety but also helps maintain the performance and longevity of your vehicle.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.