2017 Subaru Legacy Tire Pressure Warning Light Stays On

Resolve Tire Pressure Warning Light in 2017 Subaru Legacy

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Reviewed by
Andrew Hajjar
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 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 2017 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 on my 2017 Subaru Legacy?

To effectively diagnose the tire pressure warning light issue on your 2017 Subaru Legacy, 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 recommended levels specified in your owner's manual or on the sticker located inside the driver's side door jamb. Next, conduct a thorough visual inspection of each tire for any signs of damage, such as punctures, cuts, or bulges, as these can lead to pressure loss and trigger the warning light. Additionally, look for potential leaks by examining the tires and valve stems; a mixture of soap and water can help reveal leaks, as bubbles will form where air escapes. If you have corrected the tire pressure but the warning light remains illuminated, consult your owner's manual for instructions on resetting the tire pressure monitoring system (TPMS). Should the issue persist despite these efforts, it may be prudent to seek assistance from a qualified mechanic or a Subaru dealership for a comprehensive diagnosis. By following this methodical approach, you can efficiently address the tire pressure warning light issue and ensure your vehicle's safety and performance.

What could cause the tire pressure warning light to stay on in a 2017 Subaru Legacy?

When the tire pressure warning light remains on in your 2017 Subaru Legacy, it can be frustrating, but understanding the common problems can help you diagnose the issue. One of the primary culprits is low tire pressure, which is easily checked with a tire pressure gauge. Ensure all tires are inflated to the manufacturer's recommended levels, as even a slight drop can trigger the warning light. If the pressure is adequate, consider the possibility of a faulty tire pressure sensor; these sensors can wear out over time and may need replacement. Additionally, sensor calibration issues can arise, particularly if tires have been recently changed or rotated, necessitating a recalibration to ensure accurate readings. Electrical faults within the tire pressure monitoring system can also cause persistent warnings, so a diagnostic check may be required to pinpoint the problem. Lastly, check for any obstructions or dirt around the sensors, as these can interfere with their functionality. By systematically addressing these potential issues, you can effectively troubleshoot the tire pressure warning light in your Subaru Legacy.

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

Addressing the tire pressure warning light in your 2017 Subaru Legacy is not just a matter of convenience; it is a critical safety concern that requires immediate attention. Ignoring this warning can lead to compromised vehicle handling and braking, significantly increasing the risk of accidents, particularly in challenging driving conditions. Additionally, driving on underinflated tires accelerates uneven wear, which can necessitate costly premature tire replacements. The impact on fuel efficiency is another important factor; underinflated tires can lead to higher fuel consumption, ultimately costing you more at the pump. Furthermore, neglecting to rectify low tire pressure can result in severe tire damage, including the risk of blowouts while driving. Therefore, it is essential to regularly check and adjust your tire pressure according to the manufacturer's specifications. If the warning light persists even after adjustments, it is advisable to consult a professional mechanic to diagnose any underlying issues, ensuring your vehicle remains safe and efficient on the road.

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