2017 Lexus RC300 Tire Pressure Warning Light Stays On

Addressing Tire Pressure Warning Light in 2017 Lexus RC300 for Safe Driving

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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 2017 Lexus RC300 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 RC300 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 tire pressure warning light that stays on in a 2017 Lexus RC300?

When faced with a tire pressure warning light that remains illuminated in your 2017 Lexus RC300, the first step is to check the tire pressure in all four tires, including the spare. Using a reliable tire pressure gauge, ensure that each tire is inflated to the manufacturer's specified levels, as incorrect pressure can trigger the warning light. Next, conduct a visual inspection of the tires for any visible damage such as punctures, cuts, or bulges, which could indicate a loss of pressure. If the tires appear to be in good condition, consider resetting the tire pressure monitoring system, as this can sometimes clear false alerts. Additionally, inspect the valve stems for any signs of wear or leaks, as faulty stems can also lead to pressure loss. Finally, if the warning light persists, using a diagnostic tool to scan for fault codes related to the tire pressure monitoring system can help identify any underlying issues. By following these steps, you can effectively diagnose and address the tire pressure warning light in your Lexus RC300.

What could be causing the tire pressure warning light to stay on in a 2017 Lexus RC300?

When the tire pressure warning light stays on in a 2017 Lexus RC300, it can indicate several underlying issues that DIY enthusiasts can troubleshoot. The most common reason is low tire pressure, so the first step is to check and inflate all tires to the recommended levels. If the pressure is adequate, the problem may stem from a faulty tire pressure sensor, which might need replacement. Additionally, sensor calibration issues can occur, requiring a recalibration to ensure accurate readings. Electrical faults within the tire pressure monitoring system can also trigger the warning light, and these may necessitate the use of diagnostic tools for proper identification. Environmental factors, such as extreme temperature fluctuations or driving over rough terrain, can also impact tire pressure readings, making it essential to regularly monitor and adjust tire pressure as needed. If these troubleshooting steps do not resolve the issue, seeking assistance from a professional mechanic is advisable for a comprehensive inspection and diagnosis.

How urgent is it to address the tire pressure warning light on a 2017 Lexus RC300 that stays on?

Addressing the tire pressure warning light on a 2017 Lexus RC300 is not just a matter of convenience; it is a critical safety concern that requires immediate attention. When this light remains illuminated, it signals that one or more tires may be underinflated, which can severely compromise vehicle handling and braking performance. This is particularly dangerous in adverse weather conditions, where the risk of accidents increases significantly. Additionally, driving on underinflated tires can lead to uneven wear, resulting in the need for premature tire replacements, which can be costly. Furthermore, low tire pressure negatively impacts fuel efficiency, leading to higher fuel costs over time. Ignoring this warning can also cause irreversible damage to the tires, increasing the likelihood of a blowout while driving. Therefore, it is essential to check the tire pressure, inflate the tires to the recommended levels, and inspect for any leaks or punctures as soon as the warning light stays on. If the light persists despite these measures, it may indicate a more serious underlying issue that warrants professional evaluation. Taking prompt action not only ensures your safety but also protects your vehicle from potential damage and unnecessary expenses.

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