2023 Subaru Legacy Tire Pressure Warning Light Stays On

Resolve Tire Pressure Warning Light in 2023 Subaru Legacy: Causes and Solutions

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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 2023 Subaru Legacy 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 2023 Subaru Legacy 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 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.

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 2023 Subaru Legacy?

To effectively diagnose the tire pressure warning light issue in your 2023 Subaru Legacy, begin with a straightforward approach that prioritizes simple checks before delving into more complex diagnostics. Start by manually measuring the tire pressure in all four tires using a reliable tire pressure gauge, ensuring that the readings align with the recommended PSI found in your owner's manual or on the driver's side door jamb sticker. Next, conduct a thorough visual inspection of each tire for any signs of damage, such as punctures, cuts, or bulges, and check for any foreign objects that may be lodged in the tread, as these can lead to air leaks. If the tire pressure is correct and the tires appear undamaged, the next step is to reset the tire pressure monitoring system (TPMS), as it may require recalibration after adjustments. Refer to your owner's manual for specific instructions on how to perform this reset. However, if the warning light remains illuminated despite these efforts, it may indicate a malfunctioning sensor or other underlying issues, at which point consulting a mechanic or dealership for professional diagnosis and repair is advisable. By following this methodical approach, you can efficiently address the tire pressure warning light and maintain your vehicle's safety and performance.

What could be causing the tire pressure warning light to remain on in my 2023 Subaru Legacy?

When the tire pressure warning light stays on in your 2023 Subaru Legacy, it can indicate several underlying issues that may require your attention. The most straightforward cause is low tire pressure, which can be easily checked and corrected by inflating your tires to the recommended levels. However, if the pressure is adequate and the light remains illuminated, the problem might stem from a faulty tire pressure monitoring system (TPMS) sensor. These sensors can malfunction, leading to inaccurate readings, and may need replacement or recalibration. Additionally, if your vehicle is equipped with TPMS sensors that rely on batteries, low or dead batteries could also trigger the warning light. In some instances, a broader malfunction within the TPMS system itself may be at play, necessitating a diagnostic scan by a professional mechanic to identify the specific issue. It's also worth noting that extreme temperature changes can affect tire pressure, so adjusting for these fluctuations can sometimes resolve the warning light. If you've addressed these common issues and the light persists, seeking the expertise of a qualified mechanic is recommended to ensure your vehicle remains safe and reliable on the road.

How urgent is it to address the tire pressure warning light that stays on in a 2023 Subaru Legacy?

Addressing the tire pressure warning light in your 2023 Subaru Legacy is not just a matter of convenience; it is a critical safety issue that demands immediate attention. Ignoring this warning can lead to serious consequences, including compromised vehicle handling and increased risk of accidents due to poor traction and braking performance. Additionally, driving on underinflated tires can accelerate tire wear, resulting in costly replacements and the potential for dangerous blowouts while on the road. Furthermore, neglecting to maintain proper tire pressure can significantly impact your vehicle's fuel efficiency, leading to higher fuel costs over time. To ensure your safety and the longevity of your vehicle, it is essential to check your tire pressure regularly, inflate your tires to the recommended levels, and promptly address any underlying issues that may cause the warning light to remain illuminated. Taking these steps not only enhances your driving experience but also safeguards your investment in your Subaru Legacy.

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