2017 Lexus IS300 Tire Pressure Warning Light Stays On

Resolve Tire Pressure Warning Light in 2017 Lexus IS300 for Safe Driving Conditions

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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 2017 Lexus IS300 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 2017 Lexus IS300 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 are the initial steps to diagnose a persistent tire pressure warning light on a 2017 Lexus IS300?

To effectively diagnose a persistent tire pressure warning light on your 2017 Lexus IS300, start with the simplest and most common issue: tire pressure. Begin by checking that all tires are inflated to the manufacturer's recommended levels, as low pressure is often the primary culprit behind such warnings. Next, visually inspect each tire for any signs of damage, such as punctures or bulges, which could indicate a leak. If the tires appear to be in good condition, proceed to reset the tire pressure monitoring system as outlined in your vehicle's manual; this can sometimes resolve the issue if it was triggered erroneously. Additionally, examine the tire pressure sensors for any signs of malfunction or damage, as faulty sensors can also cause the warning light to remain illuminated. If, after completing these steps, the warning light persists, it may be time to consult a professional mechanic for a more thorough diagnosis and repair. By following this structured approach, you can efficiently troubleshoot the issue and potentially save on repair costs.

What could be causing the tire pressure warning light to stay on in a 2017 Lexus IS300?

When the tire pressure warning light stays on in a 2017 Lexus IS300, it can indicate several common issues that DIY enthusiasts should consider. The most frequent cause is low tire pressure, which can easily be checked and corrected by inflating the tires to the recommended levels. If the tire pressure is adequate, the next step is to inspect the tire pressure sensor, as a malfunctioning sensor may need replacement. Additionally, sensor calibration can sometimes be off, requiring a recalibration to ensure accurate readings. Electrical faults within the tire pressure monitoring system can also trigger the warning light, and diagnosing these may necessitate specialized tools. Environmental factors, such as extreme temperature fluctuations or driving over rough terrain, can temporarily affect tire pressure readings, making it essential to regularly monitor and adjust tire pressure as needed. By addressing these potential issues, you can enhance your vehicle's safety and performance. If the warning light remains illuminated after these checks, it may be time to consult a professional for a more thorough diagnosis.

How urgent is it to address the tire pressure warning light that stays on in a 2017 Lexus IS300?

Addressing the tire pressure warning light in your 2017 Lexus IS300 is not just a matter of convenience; it is a critical safety concern that requires immediate attention. When this warning light remains illuminated, it signals that your tires may be underinflated, which can severely compromise your vehicle's handling and braking capabilities. This increases the likelihood of accidents, particularly in emergency situations where quick response is essential. Furthermore, driving on improperly inflated tires can lead to uneven wear, significantly shortening their lifespan and raising the risk of a blowout while on the road. Additionally, underinflated tires can negatively impact your fuel efficiency, leading to higher fuel costs over time. Ignoring the warning light may also indicate a malfunction in the Tire Pressure Monitoring System (TPMS), which is designed to alert you to tire issues before they escalate. Therefore, it is crucial to check and adjust your tire pressure promptly or consult a mechanic to diagnose any underlying problems, ensuring both your safety and the longevity of your vehicle.

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