2015 Scion FR-S Tire Pressure Warning Light Stays On

Common Causes for the Tire Pressure Warning Light in Your 2015 Scion FR-S and How to Resolve Them

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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 2015 Scion FR-S 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 2015 Scion FR-S 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 2015 Scion FR-S?

To effectively diagnose the tire pressure warning light issue in your 2015 Scion FR-S, begin with a thorough check of the tire pressure in all four tires using a reliable tire pressure gauge. It's essential to ensure that the pressure aligns with the recommended PSI found in your owner's manual or on the driver's side door jamb sticker. Next, inspect each tire for visible damage such as punctures, cuts, or bulges, and look for signs of uneven wear that could suggest an alignment problem. If the tire pressure is correct and the tires appear undamaged, consider resetting the tire pressure monitoring system (TPMS) as outlined in your owner's manual, which may resolve the warning light issue. However, if the light remains illuminated, it may be time to consult a mechanic or tire shop, where professionals can utilize specialized tools to diagnose the problem accurately. In some instances, the tire pressure monitoring sensors themselves may be faulty and require replacement, a task best handled by a qualified technician. By following this diagnostic approach, you can systematically address the tire pressure warning light issue and ensure your vehicle's safety and performance.

What could be causing the tire pressure warning light to stay on in a 2015 Scion FR-S?

When the tire pressure warning light stays on in your 2015 Scion FR-S, it’s important to identify the underlying issues that may be causing this alert. One of the most frequent reasons is low tire pressure, which can result from natural air loss or changes in temperature. Regularly checking and adjusting your tire pressure to the manufacturer’s recommended levels is vital for safe driving. Another possibility is a faulty tire pressure sensor; if the sensor is not functioning correctly, it may need to be replaced to ensure accurate readings. Additionally, sensor calibration can sometimes be off, requiring a recalibration process to restore proper functionality. Electrical faults within the tire pressure monitoring system can also trigger the warning light, necessitating a thorough inspection of the system’s components. Lastly, external factors such as rough driving conditions or extreme weather can impact tire pressure, so it’s advisable to check your tires after such events. By understanding these common problems, you can take the necessary steps to troubleshoot and resolve the tire pressure warning light issue effectively.

What should I do if the tire pressure warning light stays on in my 2015 Scion FR-S?

When the tire pressure warning light stays illuminated in your 2015 Scion FR-S, it is essential to take immediate action to ensure your safety and prevent further complications. Neglecting this warning can lead to serious consequences, including decreased traction, increased tire wear, and the risk of a tire blowout, which can jeopardize your safety on the road. Begin by checking the tire pressure in all four tires, including the spare, using a reliable tire pressure gauge. If you discover any tires are underinflated, promptly inflate them to the recommended levels outlined in your vehicle's manual. Additionally, conduct a thorough inspection of each tire for any signs of damage, such as punctures or bulges, as these can significantly affect tire performance and safety. Once you have made the necessary adjustments, you may need to reset the tire pressure monitoring system; consult your manual for the correct procedure. If the warning light remains on after these steps, it is wise to seek assistance from a qualified mechanic to diagnose any potential issues with the monitoring system. By addressing the tire pressure warning light promptly, you not only enhance your driving safety but also contribute to the overall health and longevity of your vehicle.

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2015 Scion FR-S Tire Pressure Warning Light Causes & Fixes