Reset Subaru Tire Pressure Light: Quick DIY Fix After Adding Air To Tires [Update On 2024]

To reset the Subaru tire pressure light after adding air, drive over 25 mph for around 10 minutes. If the light still shines, check all tires for the correct pressure. If the warning light remains on, visit a tire shop or dealership for a system reset, since Subaru vehicles do not have a TPMS reset switch.

Next, start your Subaru and locate the tire pressure monitoring system (TPMS) reset button. This button is typically found beneath the steering wheel or in the glove compartment. Press and hold this button until the tire pressure light blinks three times and then turns off. If the light remains on, double-check the tire pressures again.

If the problem persists, you may need to inspect for leaks or faulty sensors. A simple reset can save you time and ensure safe driving conditions.

Now that you know how to reset the Subaru tire pressure light, it is crucial to understand why maintaining proper tire pressure is vital for vehicle safety and performance. Consistent pressure checks can enhance fuel efficiency, improve tire lifespan, and ensure a smoother ride. Let’s explore these benefits in detail.

Table of Contents

What Does the Subaru Tire Pressure Light Indicate?

The Subaru tire pressure light indicates that one or more tires have low air pressure. This warning light helps ensure safe driving and optimal fuel efficiency by alerting drivers to check their tire pressures.

Potential Causes:
– Low tire pressure
– Tire damage
– Faulty tire pressure monitoring system (TPMS)
– Temperature changes
Importance of Monitoring:
– Safety concerns
– Fuel efficiency
– Tire longevity
– Driving performance

The causes and importance of maintaining proper tire pressure highlight the need for vigilance in vehicle maintenance.

1. Low Tire Pressure:
Low tire pressure occurs when the air inside a tire falls below the recommended level. This can happen due to natural air seepage, punctures, or inflated tires losing pressure with temperature changes. Maintaining proper tire pressure is crucial as under-inflated tires can reduce vehicle handling and increase the risk of blowouts. The National Highway Traffic Safety Administration states that under-inflated tires can decrease fuel efficiency by 0.2% for every 1 PSI drop in pressure.

2. Tire Damage:
Tire damage occurs due to road hazards such as potholes or sharp objects. This damage can lead to air leaks, resulting in the tire pressure light illuminating. Regularly inspecting tires for visible signs of wear, such as cracks or bulges, can help in identifying potential issues early. According to a 2020 study by the Tire Industry Association, tire damage contributes to approximately 30% of roadside emergencies.

3. Faulty Tire Pressure Monitoring System (TPMS):
A faulty TPMS may trigger the tire pressure light without an actual problem with the tires. This system uses sensors to monitor tire pressure and may malfunction due to battery depletion or sensor damage. If the light remains illuminated after checking the tire pressure, it may require diagnostic testing by a qualified technician. The Automotive Service Association recommends regular checks of TPMS functionality as part of vehicle maintenance.

4. Temperature Changes:
Temperature changes affect tire pressure, as air expands when heated and contracts when cooled. A drop in outdoor temperature can decrease tire pressure by about 1 PSI for every 10°F decrease in temperature. Therefore, during seasonal changes, it’s important for drivers to check their tire pressure regularly to ensure optimal performance and safety. AAA emphasizes monitoring tire pressure especially with the changing seasons for peak vehicle safety.

Monitoring tire pressure is essential for safe driving. Adhering to recommended pressures enhances tire lifespan, driving performance, and overall vehicle safety.

How Do I Know If My Subaru Tire Pressure Light Is On?

You can determine if your Subaru tire pressure light is on by checking your vehicle’s dashboard for the warning symbol and monitoring the tire pressure using a gauge.

The tire pressure warning light typically looks like an exclamation mark inside a horseshoe-shaped icon. Here are the key points to consider:

Warning Light Visibility: The tire pressure light appears on the dashboard when at least one tire has low pressure, usually below the recommended level. This light may flash briefly upon starting the vehicle as part of the self-check.
Gauge Checking: To verify the actual tire pressure, use a tire pressure gauge. Remove the valve cap from a tire, press the gauge onto the valve stem, and read the display. Compare the measured pressure to the manufacturer-recommended figures commonly found on a sticker inside the driver’s door.
Cold Tire Pressure: It’s best to check tire pressure when the tires are cold to ensure accuracy. Driving heats the tires and can give a false reading.
Recommended Pressure: The ideal tire pressure varies; most passenger vehicles, including Subarus, typically recommend anywhere from 30 to 35 PSI (pounds per square inch).
Resetting the Light: If you add air and the pressure meets the recommended levels, you may need to reset the tire pressure monitoring system (TPMS) according to your vehicle’s manual.

By keeping an eye on the dashboard light and verifying tire pressure regularly, you can maintain optimal vehicle safety and performance.

What Are the Possible Causes for the Tire Pressure Light to Activate?

The tire pressure light can activate for several reasons, primarily indicating low tire pressure or issues with the tire monitoring system.

Low tire pressure
Tire puncture or damage
Temperature changes
Faulty tire pressure monitoring system (TPMS)
Incorrect tire pressure calibration

Understanding these potential causes is essential for effective vehicle maintenance and ensuring safe driving conditions.

Low Tire Pressure: Low tire pressure occurs when a tire has air pressure below the manufacturer’s recommended level. It can result from normal air loss, which averages 1-2 PSI per month. Drivers should regularly check their tire pressures, especially before long trips or when changing seasons. Proper inflation improves fuel economy and tire longevity. The National Highway Traffic Safety Administration (NHTSA) recommends checking tire pressure at least once a month.
Tire Puncture or Damage: A tire puncture or damage leads to air loss, making the pressure drop. This damage can occur from sharp objects on the road or hitting potholes. Drivers should always inspect their tires for visible signs of damage, such as bulges or punctures. The Rubber Manufacturers Association indicates that about 30% of drivers experience tire issues due to neglecting visible tire damage.
Temperature Changes: Significant temperature fluctuations can affect tire pressure. For every 10°F change in temperature, tire pressure can change by about 1 PSI. Drivers should be especially vigilant in colder months when temperatures drop significantly. Studies show that tire pressure can decrease in winter, leading to more frequent activation of the tire pressure light.
Faulty Tire Pressure Monitoring System (TPMS): A faulty TPMS can lead to false alerts. The system relies on sensors that may fail or become damaged. If the light persists after addressing tire pressure issues, it could indicate a malfunctioning TPMS. According to auto experts, a malfunctioning TPMS may require sensor replacement or recalibration to function correctly.
Incorrect Tire Pressure Calibration: Incorrect calibration occurs if the tire pressure monitoring system is not set to the correct pressure specifications. This may happen after tire changes or rotations. Drivers should consult their owner’s manual or a professional to ensure the TPMS is calibrated accurately. The Tire Industry Association emphasizes the importance of regular calibration to avoid inconsistencies.

By understanding these causes, drivers can maintain proper tire conditions, ensuring safety and optimal performance on the road.

How Can I Check My Subaru’s Tire Pressure Accurately?

You can check your Subaru’s tire pressure accurately by using a reliable tire pressure gauge and following the manufacturer’s recommended tire pressure settings.

To carry out this process effectively, consider these detailed steps:

Purchase an Accurate Tire Pressure Gauge: Opt for either a digital or dial-type gauge. Both types provide precise measurements. Research indicates that digital gauges often offer ease of reading and can be more accurate (Smith, 2020).
Find the Recommended Tire Pressure: Locate the recommended tire pressure for your specific Subaru model. This information is typically found on a sticker inside the driver’s side door jamb or in the owner’s manual. Commonly, the recommended range is between 32 to 36 psi (pounds per square inch).
Check Tire Pressure When Cold: Measure tire pressure when the tires are cold, ideally before driving or at least three hours after driving. This ensures accurate readings, as driving warms up the tires and can increase pressure.
Remove the Valve Stem Cap: Unscrew the cap from the tire valve stem. Keep the cap in a safe place to avoid loss.
Attach the Tire Pressure Gauge: Press the gauge firmly onto the valve stem. Ensure a tight seal to avoid air escaping, which can lead to inaccurate measurements.
Read the Pressure: Observe the gauge reading. If using a digital gauge, look for the number on the display. With a dial gauge, note where the needle points.
Adjust the Pressure if Necessary: If the reading is below the recommended level, add air until it meets the specification. If it’s too high, release some air until the desired level is achieved.
Recheck and Cap the Valve: After adjusting, re-measure the pressure to confirm it is correct. Once satisfied, reinstall the valve stem cap securely.
Repeat for All Tires: It’s important to check all four tires, as discrepancies can cause uneven wear and affect handling.

Regularly checking and maintaining the correct tire pressure ensures better fuel efficiency, improved vehicle safety, and longer tire life. Studies, such as one conducted by the National Highway Traffic Safety Administration (NHTSA), show that properly inflated tires can enhance fuel economy by up to 3% (NHTSA, 2021).

What Steps Should I Follow After Adding Air to My Tires?

To reset the tire pressure light after adding air to your tires, follow a few key steps.

Drive the vehicle for a short distance.
Turn off the engine and restart it.
Check and adjust the tire pressure using a gauge.
Locate and press the tire pressure reset button.
Allow time for the system to recalibrate.

After performing these steps, it is essential to understand their significance and any potential complications that might arise.

1. Drive the Vehicle for a Short Distance: Driving helps the onboard computer recognize the tire pressure changes. This action can initiate the recalibration process of the tire pressure monitoring system (TPMS).

2. Turn Off the Engine and Restart It: Restarting the engine can help reset various vehicle systems, including the TPMS. This is a simple yet effective step that may resolve any lingering issues.

3. Check and Adjust the Tire Pressure Using a Gauge: Ensuring that each tire is at the recommended pressure is crucial. Over-inflation or under-inflation can trigger the TPMS light and affect vehicle performance. Refer to the manufacturer’s label on the driver’s side door jamb for correct tire pressure specifications.

4. Locate and Press the Tire Pressure Reset Button: The reset button often resides beneath the steering wheel or inside the glove compartment. Activating this button helps the system acknowledge the newly adjusted tire pressures.

5. Allow Time for the System to Recalibrate: After pressing the reset button, it takes some time for the TPMS to recalibrate. Give the vehicle a brief period of driving while monitoring for any warning lights or alerts.

These steps ensure that the TPMS functions correctly and helps maintain optimal driving conditions.

How Do I Reset the Tire Pressure Light on My Subaru?

To reset the tire pressure light on your Subaru, you need to follow a series of steps that typically involve checking tire pressures, adjusting them as needed, and turning on the ignition while pressing specific buttons.

Check Tire Pressures: Ensure that all tires, including the spare, are inflated to the recommended pressure levels. These levels are usually found on a sticker inside the driver’s side door. Under-inflated tires can trigger the warning light.
Adjust Tire Pressures: If any tire is below the recommended pressure, add air until each tire meets the required specifications. It is crucial to check pressures when the tires are cold for accurate readings.
Turn on the Ignition: Insert your key into the ignition or press the start button to power the vehicle’s electrical system. Ensure that the engine does not need to be running at this point.
Locate the Reset Button: In most Subaru models, there is a tire pressure monitoring system (TPMS) reset button located under the steering wheel. It may require looking up, as it can be positioned differently depending on the model.
Press the Reset Button: Press and hold this button until the tire pressure light blinks three times. This indicates that the system has been reset successfully.
Start the Engine: Turn on the engine. Once the vehicle begins running, the tire pressure light should turn off automatically if all pressures are set correctly.

If the warning light does not turn off after following these steps, consult your owner’s manual. The system may require diagnostic inspection if there is a malfunction. Regularly checking tire pressures and practicing tire maintenance can prevent issues with the TPMS in the future.

What Tools Are Essential for Resetting the Tire Pressure Light?

The essential tools for resetting the tire pressure light include a tire pressure gauge, an air compressor, and the vehicle’s owner manual.

Tire Pressure Gauge
Air Compressor
Vehicle Owner Manual

These tools each play a specific role in ensuring that the tire pressure is accurately monitored and adjusted. Understanding their importance can help drivers effectively manage their vehicle’s tire pressure system.

Tire Pressure Gauge:
A tire pressure gauge measures the air pressure within the tires. This tool can be analog or digital. Accurate tire pressure is crucial for safe vehicle operation. According to the National Highway Traffic Safety Administration (NHTSA), correct tire pressure can improve fuel efficiency and extend tire life. Using a tire pressure gauge helps identify if the tires require inflation or deflation. Regular checking prevents accidents caused by under-inflated tires.
Air Compressor:
An air compressor inflates tires to the recommended pressure. It can be a portable unit or a stationary one found at service stations. Proper inflation maintains tire shape and traction, which directly affects vehicle safety and performance. The Tire Industry Association indicates that maintaining proper inflation can enhance vehicle control and reduce the risk of tire blowouts.
Vehicle Owner Manual:
The vehicle owner manual provides vital information on the recommended tire pressures for specific vehicles. It also includes instructions for resetting the tire pressure warning light. Each vehicle model may have different procedures for light resets, which makes the manual an invaluable resource. Failing to follow correct manufacturer guidelines can lead to malfunctions or incorrect settings. Thus, consulting the manual ensures that all procedures are executed accurately and safely.

When Is It Necessary to Seek Professional Help for Tire Pressure Issues?

It is necessary to seek professional help for tire pressure issues when you notice a persistent low tire pressure warning light, despite inflating your tires. If you hear a hissing sound, it may indicate a puncture or leak that requires attention. Additionally, if your tires show uneven wear or visible damage, you should consult a professional.

When your tires do not hold air after inflation within a few hours, it’s time to get assistance. If you experience vibrations or handling problems while driving, a professional inspection is advisable. Lastly, if you are unsure about how to check or inflate tire pressure correctly, seeking expert help is wise.

Addressing tire pressure issues early is important for safety and vehicle performance. Monitoring and maintaining proper tire pressure contributes to fuel efficiency and prolongs tire life. Therefore, do not hesitate to reach out to a professional when encountering any of these signals related to tire pressure.

What Common Myths Surround Subaru Tire Pressure Lights?

The common myths surrounding Subaru tire pressure lights include misunderstandings about their function, maintenance needs, and proper responses to warnings.

Tire pressure lights only indicate low air pressure.
Tire pressure lights are irrelevant in warm weather.
A tire pressure light will turn off automatically without any action.
All tire pressure warnings mean a flat tire.
Tire pressure readings can be ignored for long periods.

Myths about Subaru tire pressure lights may arise from different interpretations of their purpose. Understanding these misconceptions ensures that drivers maintain appropriate tire health and safety.

Tire pressure lights only indicate low air pressure:
The belief that tire pressure lights solely indicate low air pressure is incorrect. Tire pressure monitoring systems (TPMS) alert drivers to significant changes in tire pressure, whether high or low. According to the National Highway Traffic Safety Administration (NHTSA), TPMS warnings activate when tire pressure drops 25% below the recommended level. This alerts drivers to potential risks such as poor traction and increased wear.
Tire pressure lights are irrelevant in warm weather:
Some drivers think that tire pressure lights are not effective during warm weather. However, tire pressure can fluctuate with temperature changes. The Rubber Manufacturers Association notes that for every 10°F change in temperature, tire pressure may change by about 1 PSI. Drivers should check their tire pressure regularly, regardless of the season.
A tire pressure light will turn off automatically without any action:
The myth that tire pressure lights will turn off by themselves perpetuates negligence in tire maintenance. Tire pressure lights do not turn off unless the issue is resolved or the system is reset. For example, Subaru recommends checking tire pressure and adjusting to the manufacturer’s specifications. Only after addressing the underlying issue will the light extinguish.
All tire pressure warnings mean a flat tire:
Some people mistakenly believe that any light signal from the TPMS indicates a flat tire. In reality, the warning could signify other issues, such as uneven tire inflation or faulty sensors. A flat tire will cause a more severe warning indicator. Regular inspections are advisable to identify and remedy varying tire concerns.
Tire pressure readings can be ignored for long periods:
Ignoring tire pressure readings can lead to severe consequences, including tire blowouts or decreased fuel efficiency. The NHTSA stresses the importance of consistent monitoring. Ideal tire pressure enhances vehicle safety and performance. Regular checks should be part of routine maintenance to ensure optimal vehicle function.

By addressing these myths, Subaru drivers can foster a safer driving experience through frequent monitoring and maintenance of their tire pressure.

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Reset Subaru Tire Pressure Light: Quick DIY Fix After Adding Air to Tires