2021 Acura ILX Tire Pressure Warning Light Stays On

Resolve Tire Pressure Warning Light in 2021 Acura ILX: Causes and Solutions

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Reviewed by
Bo Fader
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 ILX 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 ILX 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 Acura ILX?

To effectively diagnose the tire pressure warning light issue in your 2021 Acura ILX, 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 vehicle's manual, as improper inflation is a common cause of warning lights. Next, inspect the tires for any visible damage, such as punctures, cuts, or bulges, which could indicate a more serious problem. If the tires appear to be in good condition, attempt to reset the tire pressure monitoring system, as this can often clear false alerts. Additionally, examine the valve stems for any signs of damage or leaks that might be triggering the warning light. If, after completing these steps, the warning light remains illuminated, it is advisable to consult a mechanic or dealership for a professional diagnosis and repair, ensuring your vehicle's safety and performance. By following this diagnostic approach, you can systematically address the issue, starting with the simplest solutions before moving on to more complex assessments.

What could cause the tire pressure warning light to stay on in a 2021 Acura ILX?

When the tire pressure warning light remains illuminated in a 2021 Acura ILX, it often indicates underlying issues that require attention. The most prevalent cause is low tire pressure, which can result from punctures, leaks, or the natural loss of air over time. DIY enthusiasts should start by checking the pressure in all tires using a reliable gauge, ensuring they are inflated to the manufacturer's recommended levels. If the pressure is adequate, the next step is to inspect the tire pressure sensors, as a malfunctioning sensor can lead to false warnings. In some cases, recalibrating the sensors may be necessary to restore accurate readings. Additionally, it's important to examine the vehicle's electrical system for any wiring issues that could affect the tire pressure monitoring system. If these steps do not resolve the issue, the control module responsible for managing the tire pressure system may be faulty, necessitating professional diagnosis and repair. By understanding these common problems, DIYers can effectively troubleshoot and address the tire pressure warning light issue in their Acura ILX.

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

When the tire pressure warning light on your 2021 Acura ILX remains illuminated, it is crucial to take immediate action. Ignoring this warning can lead to serious safety hazards, as improper tire pressure significantly affects vehicle handling and braking capabilities, increasing the likelihood of accidents. Additionally, driving on underinflated tires accelerates uneven wear, which not only shortens the lifespan of your tires but also raises the risk of a blowout while on the road. Furthermore, neglecting to address this issue can lead to decreased fuel efficiency, as underinflated tires require more energy to roll, ultimately costing you more at the pump. To ensure your vehicle operates at its best, it is essential to regularly check and maintain the recommended tire pressure. By doing so, you enhance your vehicle's performance and safety, making it imperative to respond promptly to any tire pressure warning lights.

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2021 Acura ILX Tire Pressure Warning Light Causes & Fixes