2020 Acura RLX Tire Pressure Warning Light Stays On

Resolve Tire Pressure Warning Light in 2020 Acura RLX: 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 2020 Acura RLX 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 2020 Acura RLX 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 2020 Acura RLX?

To effectively diagnose the tire pressure warning light issue on your 2020 Acura RLX, begin with the simplest solutions before moving on to more complex diagnostics. Start by checking the tire pressure in all four tires using a reliable tire pressure gauge, ensuring they are inflated to the recommended levels specified in your owner's manual or on the sticker located inside the driver's side door jamb. Next, inspect each tire for visible damage such as punctures, cuts, or bulges that could lead to air loss. If the tire pressure is correct and there are no visible issues, consider resetting the tire pressure monitoring system (TPMS) as it may require recalibration. Don’t overlook the spare tire; check its pressure as well, since a low spare can also trigger the warning light. If the warning persists after these checks, it may indicate a more serious problem with the TPMS sensors or system, at which point consulting a mechanic or dealership for professional diagnosis and repair is advisable. By following this structured approach, you can efficiently identify and resolve the tire pressure warning light issue.

What could cause the tire pressure warning light to stay on in a 2020 Acura RLX?

When the tire pressure warning light remains on in a 2020 Acura RLX, it can be attributed to several common problems that DIYers can investigate. The most frequent culprit is low tire pressure, which can occur due to natural air loss, temperature fluctuations, or a slow leak. Checking the tire pressure with a reliable gauge is a straightforward first step. If the pressure is adequate, the issue may lie with the tire pressure sensors themselves. These sensors can malfunction or have dead batteries, preventing them from accurately relaying tire pressure information to the vehicle's system. Additionally, a malfunction within the tire pressure monitoring system, such as wiring issues or control module problems, could also be responsible for the persistent warning light. By systematically checking tire pressure, inspecting the sensors, and considering potential system malfunctions, DIY enthusiasts can effectively diagnose and address the issue, ensuring both safety and optimal vehicle performance.

How urgent is it to address the tire pressure warning light that stays on in a 2020 Acura RLX?

When the tire pressure warning light remains illuminated in a 2020 Acura RLX, it is imperative to take immediate action. Ignoring this warning can lead to serious safety hazards, as underinflated tires compromise vehicle handling and braking, increasing the risk of accidents. Additionally, driving on improperly inflated tires accelerates wear and tear, potentially resulting in costly repairs or even tire blowouts. Furthermore, neglecting to address tire pressure issues can negatively impact fuel efficiency, leading to higher fuel costs over time. The Tire Pressure Monitoring System (TPMS) is designed to alert drivers to these critical issues, and a persistent warning light indicates that something is amiss. Therefore, it is essential to check tire pressure, inflate tires to the recommended levels, and inspect for leaks or damage without delay to ensure safe and efficient driving.

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2020 Acura RLX Tire Pressure Warning Light Fix Guide