What is the TPMS problem on a Subaru?

Understanding TPMS Problems on a Subaru
The Tire Pressure Monitoring System (TPMS) in a Subaru is designed to alert drivers when the tire pressure is significantly low. Here’s a breakdown of the common issues and how the system works:
1. TPMS Functionality on Subaru Vehicles
The TPMS in Subaru vehicles was first introduced in 2004 with models like the Subaru Outback and Subaru Legacy. It was later integrated into all other models by 2008.
2. Causes of TPMS Alerts
When the TPMS light illuminates, it indicates that one or more tires on the Subaru have low pressure. This can be due to a puncture, a leak, or even a significant swing in outside temperature.
3. Location of TPMS Control Module
The location of the TPMS control module in Subaru vehicles varies by make and year. It can be found behind the dash or in the trunk, and in some newer models, it’s integrated with the keyless entry control module.
4. Potential Issues with TPMS
If the tire pressure is dropping but the warning light doesn’t illuminate, it could indicate issues with the sensor, vehicle harness, or control module. In some cases, a 3psi difference can cause the TPMS light to come on, and there have been reports of TPMS sensors not working properly only at high speeds.
5. Troubleshooting and Maintenance
If the TPMS light comes on, it’s recommended to visually inspect all four tires. If one tire doesn’t appear lower than the rest, it’s advisable to drive the vehicle to a service center for a check of the tire pressure and potential air addition. Additionally, when a sensor is replaced or tires are rotated, a TPMS relearn is recommended to transfer the new TPMS sensor IDs to the vehicle’s ECU.
In summary, the TPMS in Subaru vehicles serves as a crucial safety feature, alerting drivers to low tire pressure and potential issues. If the TPMS light comes on, it’s important to promptly address the situation to ensure safe driving conditions.

How do I fix TPMS problems?

One of the first things you can do is check the battery voltage of the sensor. If the battery is low, replacing it may solve the problem. You can also try reprogramming the sensor or resetting the system, which can sometimes resolve issues with inaccurate readings or warning lights.

How do you clear the TPMS light on a Subaru?

Unfortunately, Subaru doesn’t install a TPMS reset switch on cars sold in the U.S. If the warning light remains illuminated even after you’ve confirmed that your tires are inflated to the correct pressure, you’ll need to visit a tire shop or a dealership to have the system reset.

Can you drive with a faulty TPMS?

You will not be able to see this damage, which can increase over time. This is why you should maintain proper inflation pressure and try to avoid driving when the TPMS light is on.

What causes TPMS to malfunction?

When the battery in a TPMS sensor dies, it will trigger a malfunction warning from the system, indicated by a blinking TPMS light on your dashboard. It may continue to flash, or it may turn solid after 60-90 seconds.

Why is my TPMS light on but tires are fine?

The causes can be a malfunction, or the weather changes. Other reasons why your TPMS light may still be blinking is because your tire may be damaged, or you might have gotten a recent tire replacement. Overall, the reasons can be vast, which is why it is best to take your car to a technician for professional diagnosis.

What is the TPMS issue on a Subaru?

The TPMS signifies that one or more of your tires is not at the correct tire pressure. It’s time to pull out your tire gauge and pump, or find yourself a gas station.

Where is the TPMS reset button?

Set the parking brake. Look for a button to the left of the steering column labeled with the TPMS icon if it’s there push and hold it until the TPMS indicator in the instrument panel blinks twice.

What is the life expectancy of a Subaru TPMS sensor?

TPMS Life Expectancy
The estimated life expectancy of an OE TPMS sensor is 5 to 12 years, with the average lifespan being 7 years. TPMS life expectancy is directly related to the number of radio frequency transmissions the sensors make.

How do you manually turn off TPMS light?

Hold the TPMS reset button until the tire pressure light blinks three times, then release it. Start the car and wait about 20 minutes for the sensor to refresh. You will find the tire pressure monitor reset button under the steering wheel. Refer to your vehicle’s owner’s manual if you can’t find it.

Is it OK to drive with TPMS light on?

As we mentioned earlier, a tire pressure light is a warning, not a command, so you don’t need to pull over immediately if you see it come on. However, driving on underinflated tires can be dangerous and can cause a variety of problems, including poor handling, reduced fuel efficiency, and increased tire wear.