2006 Subaru Legacy Tire Pressure Warning Light Stays On

Common Causes for the Tire Pressure Warning Light in Your 2006 Subaru Legacy and How to Resolve Them

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Reviewed by

Bo Fader

Written by RepairPal Car Genius

Updated January 14, 2025

40% chance it's the

Tire Leaking Air

30% chance it's the

Wheel Leaking Air

15% chance it's the

Tire Pressure Monitoring System

15% chance it's

Something else

The most common reasons a 2006 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 tire 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.

What are the best Subaru repair shops?

RepairPal Certified shops can diagnose and repair your 2006 Subaru Legacy electronics and electrical issues. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

How much does it cost to fix a 2006 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.

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.

How urgent is it to address the tire pressure warning light that stays on in a 2006 Subaru Legacy?

Addressing the tire pressure warning light in a 2006 Subaru Legacy is an urgent matter that should not be overlooked. Ignoring this warning can lead to serious safety concerns, as driving on under-inflated tires significantly increases the risk of tire failure, which can compromise vehicle control and lead to accidents. Additionally, low tire pressure can cause premature tire wear and diminish traction, adversely affecting handling and braking performance. If the warning light remains illuminated even after checking and inflating the tires to the recommended levels, it may indicate a malfunction in the tire pressure monitoring system (TPMS), necessitating professional attention. Given that tire-related accidents account for numerous fatalities each year, it is crucial to promptly address any issues related to tire pressure to maintain optimal vehicle safety and performance. Taking immediate action not only protects you and your passengers but also helps prevent costly tire damage and ensures a smoother driving experience.

What steps should I take to diagnose the tire pressure warning light issue on my 2006 Subaru Legacy?

To effectively diagnose the tire pressure warning light issue on your 2006 Subaru Legacy, begin with a straightforward approach by checking the tire pressure across all four tires. Ensuring that each tire is inflated to the manufacturer's recommended levels is crucial, as improper inflation is a common trigger for the warning light. Next, inspect the tires for any visible signs of leaks or damage, as a compromised tire can lead to air loss and activate the warning system. If the tires appear to be in good condition, the next step is to verify the functionality of the tire pressure monitoring system (TPMS) sensors, as malfunctioning sensors can also cause the light to remain illuminated. If all checks are satisfactory, consider resetting the TPMS, which can often resolve lingering warning lights. Finally, consult your owner's manual for specific guidance tailored to your vehicle, as it may offer additional troubleshooting steps or reset procedures. By following this diagnostic approach, you can systematically address the tire pressure warning light issue and ensure your Subaru Legacy is safe and road-ready.

Related 2006 Subaru Legacy Problems

Read about related problems experienced by other Subaru Legacy drivers like you.

Subaru Legacy multiple blown wheel bearings causing droning noise

Some Subaru Legacy owners report experiencing issues with blown wheel bearings, which can lead to a droning noise while driving. This noise often manifests as a low-pitched grinding sound originating from the wheel or tire area, and it tends to be more pronounced at highway speeds, varying with the type of pavement. Additionally, some owners notice vibrations in the steering wheel that coincide with the noise, indicating potential problems with the wheel bearings. It is crucial for owners to address blown wheel bearings promptly to prevent further damage and ensure safety while driving. For those suspecting blown wheel bearings, consulting a professional mechanic for inspection and repair is highly recommended to maintain vehicle performance and safety.

2 model years affected

Avg Mileage: 1144,000

4 others reported problem

1 comment

Dodge Charger tire pressure warning light remains on despite correct pressure setting

Some Dodge Charger owners report experiencing persistent tire pressure warning lights even when tire pressures are correctly set. This issue may stem from several factors, including leaking tires, wheels that fail to hold air, or a malfunctioning tire pressure monitoring system (TPMS). Many owners are advised against driving with the warning light illuminated, as it could indicate insufficient tire pressure or a faulty sensor that isn't connecting to the vehicle's ECM/ECU. The TPMS light serves as a warning that tire pressure is outside the manufacturer’s specified threshold. When the amber TPMS light activates, it is recommended to safely stop and check the tire pressure on all wheels, including the spare, since driving on under-inflated tires can lead to overheating and potential tire failure. Additionally, some owners find that the warning may require a reset based on the last shutdown and new start pressures. If the TPMS warning light flashes and then remains solid, it indicates a system fault may be present. If the low tire pressure light stays on despite correct pressures, owners may need to reset the TPMS or investigate issues with the TPMS sensor, sensor battery, or receiver.

1 model year affected

See More 2006 Subaru Legacy Problems

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