2021 Lexus ES250 Tire Pressure Warning Light Stays On

Resolve Persistent Tire Pressure Warning Light in 2021 Lexus ES250

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Reviewed by
Devin Cabugcal
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 Lexus ES250 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 Lexus ES250 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 Lexus ES250?

To effectively diagnose the tire pressure warning light issue in your 2021 Lexus ES250, begin with a straightforward approach that prioritizes simple solutions before delving into 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 levels recommended in your vehicle's manual. This initial step is crucial, as improper tire pressure is a common trigger for the warning light. Next, inspect each tire for visible damage, such as punctures or bulges, which could also contribute to pressure loss. If the tires appear to be in good condition, consider resetting the tire pressure monitoring system, as temporary fluctuations can sometimes cause the warning light to activate. Don’t overlook the spare tire; checking its pressure is essential, as a low spare can also set off the warning. If, after these checks, the warning light remains illuminated, it may be time to consult a mechanic for a more detailed inspection, as there could be underlying issues that require professional attention. By following this methodical approach, you can efficiently address the tire pressure warning light concern in your Lexus.

What could be causing the tire pressure warning light to remain on in a 2021 Lexus ES250?

When the tire pressure warning light remains on in a 2021 Lexus ES250, it can be attributed to several common problems that DIYers can investigate. First and foremost, low tire pressure is the most frequent culprit; checking and inflating all tires to the manufacturer's recommended levels is a straightforward task that can often resolve the issue. If the tire pressure is adequate, the next step is to consider the possibility of a faulty tire pressure sensor. These sensors can malfunction, requiring either recalibration or replacement, which may involve some technical know-how. Additionally, the sensors are powered by batteries that can deplete over time, so checking the battery status is also advisable. If these components are functioning correctly, it may be worth examining the wiring and connections for any signs of damage or disconnection, as these can lead to system malfunctions. Lastly, keep in mind that significant temperature fluctuations can naturally affect tire pressure, so adjusting for these changes may also be necessary. By systematically addressing these potential issues, you can effectively troubleshoot the persistent tire pressure warning light and ensure your vehicle's safety and performance.

How urgent is it to address the tire pressure warning light on my 2021 Lexus ES250?

Addressing the tire pressure warning light on your 2021 Lexus ES250 is an urgent matter that should not be overlooked. Ignoring this warning can lead to serious safety concerns, as underinflated tires compromise your vehicle's handling and braking capabilities, increasing the risk of accidents. Additionally, driving with improper tire pressure can result in uneven tire wear, which not only shortens the lifespan of your tires but also negatively impacts fuel efficiency, leading to higher costs over time. The risk of tire damage, including blowouts or flats, escalates when tire pressure is neglected, posing a significant danger to you and other road users. Furthermore, maintaining the correct tire pressure is essential for optimal vehicle performance, affecting traction, steering response, and overall ride comfort. The tire pressure monitoring system in your Lexus is designed to alert you to these issues, and timely action can prevent further complications. Therefore, it is crucial to check and adjust your tire pressure as soon as the warning light appears, ensuring a safe and efficient driving experience.

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