How to Change Kpa to Psi Subaru Crosstrek 2018

Changing KPA to PSI on your 2018 Subaru Crosstrek is quick and easy using the dashboard settings. This guide walks you through every step so you can monitor tire pressure in the units you prefer.

If you’ve recently purchased a 2018 Subaru Crosstrek or are just getting familiar with its dashboard settings, you might have noticed something a little confusing: the tire pressure monitoring system (TPMS) displays pressure in kilopascals (KPA), not pounds per square inch (PSI). If you’re like most drivers in the United States, you’re used to seeing tire pressure in PSI—the standard unit for tire inflation across the country. Seeing numbers like 220 or 240 KPA instead of 32 or 35 PSI can be disorienting, especially when you’re trying to check if your tires are properly inflated.

The good news? You don’t have to live with KPA if you don’t want to. The 2018 Subaru Crosstrek allows you to easily switch the display from KPA to PSI using the vehicle’s onboard menu system. This change is completely free, requires no special tools, and takes less than two minutes. Whether you’re preparing for a long road trip, adjusting tire pressure for winter driving, or simply want your dashboard to match your tire gauge, knowing how to change KPA to PSI on your Crosstrek is a valuable skill.

In this comprehensive guide, we’ll walk you through the entire process step by step. We’ll explain why Subaru uses KPA by default, how the TPMS works, and exactly how to navigate your Crosstrek’s menu to make the switch. We’ll also cover best practices for checking tire pressure, tips for maintaining optimal inflation, and answers to common questions. By the end, you’ll feel confident managing your tire pressure like a pro—no matter which unit you prefer.

Key Takeaways

• KPA and PSI are both units of pressure: KPA (kilopascals) is metric, while PSI (pounds per square inch) is imperial. Most U.S. drivers prefer PSI for tire pressure.
• The 2018 Subaru Crosstrek displays tire pressure in KPA by default: This can confuse drivers used to PSI, but the setting can be changed in the vehicle menu.
• Access the setting via the steering wheel controls: Use the arrow buttons on the left side of the steering wheel to navigate the instrument cluster menu.
• No tools or dealership visit required: The conversion is done entirely through the car’s onboard system—no need for external devices or mechanics.
• Accurate tire pressure improves safety and fuel efficiency: Using the correct unit helps you maintain proper inflation, reducing wear and improving handling.
• Always check tire pressure when tires are cold: For the most accurate reading, check pressure before driving or after the car has sat for at least 3 hours.
• Save your preference permanently: Once changed, the 2018 Crosstrek will display PSI until you switch it back.

Understanding KPA and PSI: What’s the Difference?

Before diving into the steps to change the display, it helps to understand what KPA and PSI actually mean—and why they matter for your Subaru Crosstrek.

KPA stands for kilopascals, a unit of pressure commonly used in countries that follow the metric system. One kilopascal equals 1,000 pascals, which is a measure of force per unit area. PSI, on the other hand, stands for pounds per square inch and is the standard unit used in the United States and a few other countries. It measures how many pounds of pressure are exerted on one square inch of surface.

So, which one is better? Neither is inherently superior—it’s mostly a matter of regional preference and familiarity. In the U.S., tire manufacturers, gas stations, and mechanics almost always use PSI. That’s why most drivers feel more comfortable seeing “32 PSI” than “220 KPA,” even though they represent nearly the same pressure.

For reference, here’s a quick conversion:
– 1 PSI ≈ 6.895 KPA
– So, 32 PSI ≈ 220.6 KPA
– And 35 PSI ≈ 241.3 KPA

This means that if your Crosstrek shows 220 KPA, your tires are inflated to about 32 PSI—perfectly normal for everyday driving. But if you’re used to checking your tires with a PSI gauge, seeing KPA can make it harder to know if you’re in the right range.

Why Does Subaru Use KPA by Default?

You might be wondering why Subaru chose KPA as the default unit for the 2018 Crosstrek, especially since the car is sold in the U.S. where PSI is standard. The answer lies in global manufacturing and design consistency.

Subaru is a Japanese automaker, and Japan uses the metric system. To streamline production and reduce complexity across international markets, Subaru often designs its vehicles with metric units as the default. This means that even U.S.-bound models like the Crosstrek come out of the factory with KPA displayed on the dashboard.

While this makes sense from a manufacturing standpoint, it can be inconvenient for American drivers. That’s why Subaru included the option to switch to PSI—so drivers can customize the display to match their preferences.

Why It Matters for Tire Safety

Using the correct unit isn’t just about convenience—it’s about safety. Underinflated or overinflated tires can lead to poor handling, reduced fuel efficiency, increased wear, and even blowouts. The recommended tire pressure for the 2018 Subaru Crosstrek is typically between 32 and 35 PSI (220–240 KPA), depending on driving conditions and load.

If you’re not familiar with KPA, you might misread the numbers and think your tires are underinflated when they’re actually fine—or vice versa. For example, seeing 200 KPA might make you think your tires are low, but that’s still about 29 PSI, which is close to the recommended range. Conversely, 260 KPA (about 38 PSI) might seem high, but it could be appropriate for highway driving or carrying extra weight.

By switching to PSI, you eliminate confusion and make it easier to maintain proper tire pressure. This small change can have a big impact on your car’s performance, safety, and longevity.

How the Tire Pressure Monitoring System (TPMS) Works

Before we get into the steps to change KPA to PSI, it’s important to understand how the tire pressure monitoring system (TPMS) in your 2018 Subaru Crosstrek actually works. This system is designed to alert you when one or more tires are significantly underinflated, which can compromise safety and fuel economy.

The 2018 Crosstrek uses a direct TPMS, which means each wheel has a sensor that measures the actual air pressure inside the tire. These sensors transmit real-time data to the car’s computer, which then displays the pressure readings on the instrument cluster. Unlike older indirect systems that estimate pressure based on wheel speed, direct TPMS gives you precise, individual readings for each tire.

Where to Find the TPMS Display

The TPMS readings appear in the multi-information display (MID), which is the screen located between the speedometer and tachometer on the dashboard. When you start the car, the system performs a brief check and shows the current pressure for all four tires. If a tire is low, a warning light (usually a yellow tire icon) will illuminate, and the display will show “LOW TIRE PRESSURE” or a similar message.

The pressure values are shown in KPA by default, but as we’ll see, you can easily change this to PSI.

How Often Does the TPMS Update?

The TPMS updates continuously while the car is running, but it may take a few minutes for the system to detect changes in pressure. For example, if you add air to a tire, the new reading might not appear immediately. It’s also worth noting that the sensors are battery-powered and typically last 5–10 years. If a sensor fails, the TPMS light may stay on even if tire pressure is normal, and you’ll need to have it replaced.

Limitations of the TPMS

While the TPMS is a helpful tool, it’s not a substitute for regular manual checks. The system is designed to warn you of significant pressure loss (usually 25% below recommended), but it won’t alert you to small changes or overinflation. That’s why it’s still important to check your tire pressure with a gauge at least once a month—and always before long trips.

Also, the TPMS doesn’t measure tread depth or detect damage like punctures or sidewall cracks. So even if the pressure looks good, inspect your tires regularly for signs of wear.

Step-by-Step Guide: How to Change KPA to PSI on a 2018 Subaru Crosstrek

Now that you understand the basics, let’s get to the main event: changing the display from KPA to PSI. This process is straightforward and only requires using the buttons on your steering wheel. No tools, no apps, no dealership visit—just a few taps and you’re done.

Step 1: Start Your Vehicle

First, make sure your Subaru Crosstrek is turned on. You don’t need to drive it—just turn the ignition to the “ON” position (or press the start button without pressing the brake). The dashboard lights and instrument cluster should illuminate.

Step 2: Access the Multi-Information Display (MID)

Look at the screen between your speedometer and tachometer. This is the multi-information display (MID), where all your vehicle settings and alerts appear.

On the left side of your steering wheel, you’ll see a cluster of buttons. These are used to navigate the MID menu. The key buttons you’ll use are:
– **Up and Down arrows**: Scroll through menu options
– **OK button**: Select an option
– **Return/Back button**: Go back to the previous screen

Step 3: Navigate to the “Settings” Menu

Press the **Down arrow** button repeatedly until you see the “Settings” option on the MID. It might be labeled as “Settings,” “Vehicle Settings,” or “System Settings,” depending on your model and software version.

Once you see “Settings,” press the **OK** button to enter the menu.

Step 4: Find the “TPMS” or “Tire Pressure” Option

Inside the Settings menu, use the **Down arrow** to scroll through the options. Look for one labeled “TPMS,” “Tire Pressure,” or “Tire Pressure Monitor.” This is the section that controls how tire pressure is displayed.

Press **OK** to select it.

Step 5: Change the Unit from KPA to PSI

Once you’re in the TPMS menu, you should see an option like “Unit” or “Pressure Unit.” Use the **Up or Down arrow** to highlight this option, then press **OK**.

You’ll now see a choice between “KPA” and “PSI.” Use the arrows to select **PSI**, then press **OK** to confirm.

Step 6: Exit the Menu

After selecting PSI, press the **Return/Back** button to exit the menu. The change is saved automatically, and you’ll now see tire pressure displayed in PSI on the MID.

Step 7: Verify the Change

To make sure it worked, look at the TPMS display. The numbers should now be in the 30–40 range (e.g., 32 PSI, 35 PSI) instead of 200–250 (e.g., 220 KPA, 240 KPA). If you see PSI, you’ve successfully changed the setting!

Pro Tips for a Smooth Process

– **Do this when parked**: For safety, always make menu changes while the car is parked and not in motion.
– **Be patient**: If the menu doesn’t respond immediately, wait a second—sometimes the system takes a moment to register button presses.
– **Repeat if needed**: If you accidentally exit the menu, just go back in and follow the steps again.
– **Check after restart**: The setting should remain in PSI even after turning the car off and on again.

Best Practices for Checking and Maintaining Tire Pressure

Now that your Crosstrek displays PSI, it’s important to use that information wisely. Proper tire maintenance goes beyond just switching units—it’s about keeping your tires in top condition for safety, performance, and fuel efficiency.

Check Tire Pressure Monthly

Even with a TPMS, it’s recommended to check your tire pressure manually at least once a month. The system is great for alerts, but a handheld gauge gives you a second opinion and can catch small changes before they become problems.

Check When Tires Are Cold

Always check tire pressure when the tires are “cold,” meaning the car hasn’t been driven for at least 3 hours—or no more than 1 mile at low speed. Driving heats up the tires, which increases pressure and gives a false reading. For the most accurate results, check in the morning before you start your day.

Use a Quality Tire Gauge

Not all tire gauges are created equal. Invest in a reliable digital or analog gauge (around $10–$20) and keep it in your glove compartment. Avoid using the gauges at gas stations, as they’re often worn out or inaccurate.

Follow the Recommended PSI

The correct tire pressure for your 2018 Subaru Crosstrek is usually listed on a sticker inside the driver’s side door jamb. It’s typically between 32 and 35 PSI for normal driving. Don’t rely on the number molded into the tire sidewall—that’s the maximum pressure, not the recommended one.

Adjust for Load and Conditions

If you’re carrying heavy loads or driving in extreme temperatures, you may need to adjust tire pressure. For example:
– **Hot weather**: Air expands, so check pressure more frequently.
– **Cold weather**: Air contracts, so tires may lose 1 PSI for every 10°F drop in temperature.
– **Heavy loads**: Increase pressure slightly (check your owner’s manual for guidance).

Don’t Overinflate

While underinflation is more common, overinflation can also be dangerous. It reduces the tire’s contact patch with the road, leading to poor traction, uneven wear, and a harsher ride. Stick to the recommended PSI unless you have a specific reason to deviate.

Troubleshooting Common Issues

Even with the right settings, you might run into a few hiccups. Here are some common issues and how to fix them.

TPMS Light Stays On After Changing Units

If the TPMS warning light remains on after switching to PSI, it’s not because of the unit change. The light indicates low pressure or a system fault. Check all four tires with a gauge to ensure they’re properly inflated. If pressure is fine, the sensor may need to be reset or replaced.

Menu Options Are Grayed Out

Some settings are only available when the vehicle is parked and in “Park” mode. If you can’t access the TPMS menu, make sure the car is fully stopped and the gear selector is in Park.

Change Doesn’t Stick After Restart

This is rare, but if the setting reverts to KPA after turning the car off, try repeating the process. Make sure you press **OK** to confirm the selection. If it keeps happening, there may be a software glitch—consult your owner’s manual or visit a Subaru dealer.

Can’t Find the TPMS Menu

Menu layouts can vary slightly by model year and trim. If you don’t see “TPMS” under Settings, look for “Vehicle,” “System,” or “Maintenance.” Some models group TPMS under “Driver Assistance” or “Safety.”

Why This Small Change Makes a Big Difference

Switching from KPA to PSI might seem like a minor adjustment, but it has real benefits for everyday driving. When you can easily read and understand your tire pressure, you’re more likely to check it regularly and maintain proper inflation. This leads to:
– Better fuel economy (properly inflated tires reduce rolling resistance)
– Longer tire life (even wear means fewer replacements)
– Improved handling and braking (especially in wet or icy conditions)
– Enhanced safety (reduced risk of blowouts and loss of control)

Plus, it just feels good to have your dashboard match your expectations. No more mental math or guessing—just clear, familiar numbers that help you drive with confidence.

Conclusion

Changing KPA to PSI on your 2018 Subaru Crosstrek is a simple but powerful way to take control of your vehicle’s maintenance. With just a few button presses, you can make your tire pressure readings easier to understand and act on. Whether you’re a daily commuter, weekend adventurer, or road trip enthusiast, knowing how to manage your tire pressure in the units you prefer is a smart move.

Remember: safety starts with the basics. Regular tire checks, proper inflation, and using the right tools can make a big difference in how your Crosstrek performs and how safe you feel behind the wheel. And now, with PSI displayed clearly on your dashboard, you’re one step closer to driving smarter.

So go ahead—make the switch today. Your tires (and your peace of mind) will thank you.

Frequently Asked Questions

Can I change KPA to PSI on other Subaru models?

Yes, most modern Subaru models with a multi-information display allow you to change the tire pressure unit from KPA to PSI. The process is similar across models like the Outback, Forester, and Impreza.

Will changing to PSI affect my TPMS accuracy?

No, changing the display unit does not affect the accuracy of the TPMS. The sensors still measure pressure the same way—only the display format changes.

Do I need to reset the TPMS after changing units?

No reset is needed. The unit change is purely cosmetic and doesn’t require recalibration of the sensors or system.

Can I switch back to KPA if I change my mind?

Absolutely. Just follow the same steps and select KPA instead of PSI. You can switch between units as often as you like.

Why doesn’t my Crosstrek show PSI even after changing the setting?

Double-check that you pressed OK to confirm the selection. If the issue persists, ensure the car is in Park and try the process again. Rarely, a software update may be needed.

Is it safe to drive with the TPMS light on?

No. The TPMS light indicates low tire pressure or a system fault. Pull over safely and check your tires. Driving with underinflated tires can lead to overheating, blowouts, or loss of control.