2021 Mazda CX-30 Tire Pressure Warning Light Stays On

Causes of Persistent Tire Pressure Warning Light in Your 2021 Mazda CX-30 and How to Resolve It

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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 2021 Mazda CX-30 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 Mazda CX-30 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 in my 2021 Mazda CX-30?

To effectively diagnose the tire pressure warning light issue in your 2021 Mazda CX-30, begin with a straightforward approach that prioritizes simpler solutions before delving into more complex diagnostics. Start by checking the tire pressure in all four tires using a reliable tire pressure gauge, ensuring that each tire is inflated to the recommended levels outlined in your vehicle's manual. Next, conduct a thorough visual inspection of the tires for any signs of damage, such as punctures, cuts, or bulges, which could indicate a more serious problem. If you find that any tires are under-inflated, use an air compressor to fill them to the appropriate pressure. After adjusting the tire pressure, it may be necessary to reset the Tire Pressure Monitoring System (TPMS) through your vehicle's settings menu or by following the specific instructions in the manual. Finally, take your Mazda CX-30 for a short drive to allow the system to recalibrate; this step is crucial as the warning light may take a moment to turn off after adjustments. By following this methodical approach, you can effectively address the tire pressure warning light issue and ensure your vehicle is safe and road-ready.

What could cause the tire pressure warning light to remain on in a 2021 Mazda CX-30?

When the tire pressure warning light remains on in your 2021 Mazda CX-30, it’s essential to understand the potential causes to ensure your vehicle's safety and performance. The most common issue is low tire pressure, which can result from natural air loss or punctures; therefore, regularly checking and inflating your tires to the recommended levels is crucial. If the tire pressure is adequate but the light stays illuminated, a faulty tire pressure sensor might be the culprit, requiring replacement. Additionally, the sensors may need recalibration to provide accurate readings, which can often be done by consulting the vehicle's manual or visiting a dealership. Electrical problems, such as issues with the wiring connected to the tire pressure monitoring system, can also trigger the warning light, necessitating a professional diagnosis. Lastly, a malfunctioning control module that monitors tire pressure could be the underlying issue, and it may need inspection or replacement. Addressing these problems promptly is vital for maintaining your vehicle's safety and functionality.

How urgent is it to address the tire pressure warning light on a 2021 Mazda CX-30 that stays on?

Addressing the tire pressure warning light on a 2021 Mazda CX-30 that remains illuminated is of utmost urgency due to several critical factors. First and foremost, maintaining proper tire pressure is essential for safe driving; low tire pressure can severely compromise vehicle handling and stability, increasing the likelihood of accidents. Additionally, neglecting this warning can lead to uneven tire wear, which not only shortens the lifespan of your tires but also raises the risk of a dangerous blowout while driving. Furthermore, incorrect tire pressure can negatively impact fuel efficiency, resulting in higher fuel costs over time. Lastly, the Tire Pressure Monitoring System (TPMS) is designed to alert drivers to low tire pressure, and ignoring this warning could indicate a malfunction that requires professional attention. Therefore, it is crucial to check and adjust tire pressure promptly to ensure safety, enhance vehicle performance, and prevent costly repairs down the line.

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2021 Mazda CX-30 Tire Pressure Warning Light Troubleshooting