2021 Acura RDX Tire Pressure Warning Light Stays On

Resolve Persistent Tire Pressure Warning Light in 2021 Acura RDX

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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 Acura RDX 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 Acura RDX 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 Acura RDX?

To effectively diagnose the tire pressure warning light issue on your 2021 Acura RDX, begin with a straightforward approach that prioritizes simple checks before moving on to more complex solutions. Start by using a tire pressure gauge to measure the pressure in all four tires, ensuring they meet the recommended levels outlined in your owner's manual. If the pressure is low, inflate the tires accordingly. Next, visually inspect each tire for any signs of damage, such as punctures or bulges, which could indicate a leak or other issues. If the tires appear to be in good condition, proceed to reset the tire pressure monitoring system as per the instructions in your manual, as this can often clear false alerts. Additionally, examine the valve stems for any signs of wear or leaks, as these can also contribute to pressure problems. If, after these steps, the warning light remains illuminated, it may be time to consult a mechanic or an authorized Acura service center for a more detailed diagnosis. This methodical approach not only helps in identifying the issue but also ensures that you address the simplest problems first, potentially saving time and money.

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

When the tire pressure warning light stays on in your 2021 Acura RDX, it’s essential to identify the underlying issues to ensure your safety and vehicle performance. The most common reason for this warning light is low tire pressure, which can be easily checked using a tire pressure gauge. If you discover that any of your tires are under-inflated, inflating them to the manufacturer’s recommended levels may resolve the issue. However, if the light remains illuminated, it could indicate a malfunctioning tire pressure sensor that may need replacement. Additionally, sensor calibration issues can occur, requiring a recalibration to ensure accurate pressure readings. It’s also important to inspect your tires for any leaks or punctures, as these can lead to a drop in pressure and trigger the warning light. Furthermore, check the wiring and connections related to the tire pressure monitoring system, as damaged or loose connections can also cause the light to stay on. Lastly, be aware that colder temperatures can naturally decrease tire pressure, so regular monitoring during winter months is advisable. By addressing these common problems, you can effectively troubleshoot and resolve the tire pressure warning light issue in your Acura RDX.

How urgent is it to address the tire pressure warning light that stays on in a 2021 Acura RDX?

Addressing the tire pressure warning light in your 2021 Acura RDX is not just a matter of convenience; it is a critical safety concern that demands immediate attention. Ignoring this warning can lead to serious consequences, including compromised vehicle handling and increased risk of accidents due to poor traction and braking performance. Additionally, driving on underinflated tires can accelerate tire wear, leading to costly replacements and the potential for dangerous blowouts while on the road. Furthermore, neglecting to maintain proper tire pressure can significantly impact your vehicle's fuel efficiency, resulting in higher fuel costs over time. To ensure your safety and the longevity of your vehicle, it is essential to check your tire pressure regularly, inflate your tires to the recommended levels, and promptly address any underlying issues that may cause the warning light to remain illuminated. Taking these proactive steps not only enhances your driving experience but also safeguards your investment in your vehicle.

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