2015 Audi S5 Tire Pressure Warning Light Stays On

Common Causes for the Tire Pressure Warning Light in Your 2015 Audi S5 and How to Resolve Them

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Reviewed by
Aisha
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 2015 Audi S5 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 2015 Audi S5 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 persistent tire pressure warning light on my 2015 Audi S5?

To effectively diagnose the persistent tire pressure warning light on your 2015 Audi S5, start with the simplest solutions before moving on to more complex diagnostics. Begin by checking the tire pressure in all four tires, ensuring they are inflated to the manufacturer's recommended levels, as low pressure is a frequent culprit for triggering the warning light. Next, visually inspect each tire for any signs of damage or punctures that could lead to air leaks. If the tires appear to be in good condition, proceed to reset the tire pressure monitoring system following the instructions in your vehicle's manual, as this can sometimes resolve the issue. Additionally, examine the tire pressure sensors for any visible damage or malfunction. If the warning light remains illuminated after these steps, it may indicate a more serious problem with the tire pressure monitoring system, at which point consulting a qualified mechanic for further diagnosis and repair is advisable. By systematically addressing these potential issues, you can effectively troubleshoot the warning light and ensure your Audi S5 is safe to drive.

What are the common problems that could cause the tire pressure warning light to stay on in a 2015 Audi S5?

When the tire pressure warning light stays on in a 2015 Audi S5, it can be a source of frustration for DIY enthusiasts. The first step in troubleshooting this issue is to check the tire pressure in all four tires, as low pressure is the most common reason for the warning light to illuminate. Make sure each tire is inflated to the recommended levels specified on the sticker located inside the driver's door. If the tire pressure is adequate, the next area to investigate is the tire pressure sensors. A faulty sensor can lead to incorrect readings, so testing or replacing any malfunctioning sensors is crucial. Additionally, consider the possibility that the sensor batteries may need replacement, as they have a finite lifespan. If the sensors are functioning properly, recalibrating the tire pressure monitoring system can help restore accuracy and resolve the warning light issue. Lastly, inspect for any electrical problems within the system, as these can also cause the light to remain on. By methodically addressing these common problems, you can effectively troubleshoot and potentially fix the tire pressure warning light issue on your own.

How urgent is it to address the tire pressure warning light that stays on in a 2015 Audi S5?

Addressing the tire pressure warning light that remains illuminated in your 2015 Audi S5 is of utmost importance due to the immediate safety concerns it presents. Low tire pressure can severely compromise your vehicle's handling and braking capabilities, increasing the likelihood of accidents, particularly in challenging driving conditions. Furthermore, driving on underinflated tires can lead to uneven wear, necessitating costly premature tire replacements. This not only affects your vehicle's performance but also diminishes fuel efficiency, resulting in higher fuel costs over time. To ensure a safe and smooth driving experience, it is crucial to check your tire pressure regularly, inflate your tires to the manufacturer’s recommended levels, and investigate any underlying issues with the tires or the tire pressure monitoring system. Ignoring this warning light can lead to significant safety hazards and financial burdens, making prompt action essential.

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