2021 Cadillac XT6 Tire Pressure Warning Light Stays On

Troubleshooting Tire Pressure Warning Light Issues in Your 2021 Cadillac XT6: Causes and Solutions

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Reviewed by
Andrew Hajjar
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 Cadillac XT6 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 Cadillac XT6 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 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 Cadillac XT6?

To effectively diagnose the tire pressure warning light issue on your 2021 Cadillac XT6, begin with a thorough check of the tire pressure in all four tires using a reliable tire pressure gauge. Ensure that each tire is inflated to the recommended levels outlined in your owner's manual, as improper inflation is a common cause of warning lights. Next, conduct a visual inspection of the tires for any signs of damage, such as punctures, cuts, or bulges, and look for any foreign objects lodged in the tread that could be affecting performance. If the tire pressure is correct and the tires appear undamaged, consider resetting the tire pressure monitoring system (TPMS) as it may require recalibration. Refer to your owner's manual for specific instructions on how to perform this reset. After making any necessary adjustments, take your vehicle for a short drive; this can help the system recalibrate and potentially turn off the warning light. If the light remains illuminated despite these efforts, it may indicate a more complex issue with the TPMS sensors or system, in which case visiting a mechanic or dealership for a professional diagnosis is recommended. By following this diagnostic approach, you can systematically address the tire pressure warning light issue and ensure your Cadillac XT6 is safe and road-ready.

What could be causing the tire pressure warning light to stay on in a 2021 Cadillac XT6?

When the tire pressure warning light remains on in your 2021 Cadillac XT6, it can be frustrating, but understanding the common problems can help you diagnose the issue. One of the primary culprits is low tire pressure, which is easily checked with a tire pressure gauge. Ensure all tires are inflated to the manufacturer's recommended levels, as even a slight drop can trigger the warning light. If the pressure is adequate, consider the possibility of a faulty tire pressure sensor; these sensors can wear out over time and may need replacement. Additionally, sensor calibration issues can arise, particularly after tire rotations or replacements, necessitating a recalibration to ensure accurate readings. Electrical faults within the tire pressure monitoring system can also cause persistent warnings, which may require a diagnostic tool to pinpoint the problem. Lastly, be mindful of environmental factors such as extreme temperatures or rough driving conditions, which can temporarily affect tire pressure. By systematically checking these common issues, you can often resolve the warning light concern without needing professional assistance. However, if the light persists after your troubleshooting efforts, consulting a certified mechanic is advisable for a comprehensive inspection.

What should I do if the tire pressure warning light stays on in my 2021 Cadillac XT6?

When the tire pressure warning light remains illuminated in your 2021 Cadillac XT6, it’s crucial to address the issue promptly to ensure your safety and prevent potential damage to your vehicle. Ignoring this warning can lead to decreased fuel efficiency, uneven tire wear, and even tire blowouts, which pose serious risks while driving. Start by checking the tire pressure in all tires, including the spare, using a reliable gauge to confirm they meet the recommended levels found in your owner’s manual or on the door jamb sticker. If you find any tires underinflated, inflate them to the correct pressure immediately. Additionally, inspect each tire for visible damage such as punctures or bulges, as these can compromise your vehicle's safety. After making necessary adjustments, you may need to reset the tire pressure monitoring system, which can typically be done through the vehicle's infotainment system. If the warning light persists despite these efforts, it’s advisable to consult a professional mechanic to diagnose any underlying issues with the monitoring system. Taking these steps not only enhances your driving experience but also safeguards your vehicle's performance and longevity.

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2021 Cadillac XT6 Tire Pressure Warning Light Guide