2012 Subaru Forester Tire Pressure Warning Light Stays On

Tire Pressure Warning Light in 2012 Subaru Forester: Causes and Solutions

Find Repair Location
Reviewed by
Devin Cabugcal
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 2012 Subaru Forester 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 2012 Subaru Forester 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 are the initial steps to diagnose the tire pressure warning light on a 2012 Subaru Forester?

To effectively diagnose the tire pressure warning light on a 2012 Subaru Forester, start with a thorough check of the tire pressure. Ensure that all tires, including the spare, are inflated to the recommended levels specified on the placard located on the driver's side door jamb. It's best to check the pressure when the tires are cold for the most accurate reading. Next, conduct a visual inspection of each tire to identify any signs of underinflation or damage, such as punctures or leaks. If the tire pressures are correct, take the vehicle for a short drive at moderate speeds; this can help the Tire Pressure Monitoring System (TPMS) recalibrate and potentially turn off the warning light. If the light continues to blink or remains illuminated, it may indicate a malfunction within the TPMS itself, possibly due to a faulty sensor. In such cases, using an OBD2 scanner that supports TPMS functions can help reset the light, but if the issue persists, consulting a professional at a tire shop or Subaru dealership is recommended for a comprehensive diagnosis and repair.

What could be causing the tire pressure warning light to stay on in a 2012 Subaru Forester?

When the tire pressure warning light stays on in your 2012 Subaru Forester, it can be a source of confusion, especially after you've ensured the tire pressures are correct. One of the first steps is to double-check that all tires, including the spare, are inflated to the manufacturer's recommended levels, which you can find on the placard located in the driver's side door jamb. It's crucial to measure tire pressure when the tires are cold for the most accurate reading. After adjusting the pressures, take your vehicle for a drive of about 10-20 minutes at speeds above 20 mph; this can help the TPMS system recalibrate and potentially turn off the warning light. If the light remains illuminated, it may indicate a malfunction within the TPMS system, such as a faulty sensor, which would require professional attention. Additionally, be aware that significant temperature changes can affect tire pressure, so monitor how the weather might be impacting your tires. Inspecting for slow leaks or punctures is also essential, as these issues may not be immediately visible. If you've recently switched tires, the TPMS may need recalibration, which can often be done at a tire shop or dealership. While some may try the battery disconnect trick to reset the system, this method is not always effective and may not address the root cause. By methodically exploring these potential issues, you can troubleshoot the persistent TPMS light in your Subaru Forester effectively.

How urgent is it to address the tire pressure warning light that stays on in a 2012 Subaru Forester?

Addressing the tire pressure warning light that remains illuminated in your 2012 Subaru Forester is of utmost urgency due to the significant safety risks and potential vehicle damage associated with underinflated tires. Ignoring this warning can lead to dangerous driving conditions, including tire blowouts, which can occur when tires overheat from insufficient air pressure. Additionally, driving on improperly inflated tires can severely compromise your vehicle's handling and performance, leading to increased wear and tear on both the tires and other components. This not only affects your vehicle's longevity but can also result in costly repairs down the line. Therefore, it is crucial to check and adjust your tire pressure as soon as the warning light appears, ensuring that you maintain optimal driving conditions and safeguard your safety on the road. Prompt action not only enhances your vehicle's performance but also prevents the escalation of minor issues into major problems, making it essential to prioritize this maintenance task.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.