2020 Ford Mustang Tire Pressure Warning Light Stays On

Tire Pressure Warning Light in 2020 Ford Mustang: Causes and Solutions

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Reviewed by
Andrew Hajjar
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 2020 Ford Mustang 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 2020 Ford Mustang 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 tire pressure monitoring sensor fails, the tire pressure monitoring system control module will recognize a loss in communication and turn on the warning lamp which indicates the failure. This is most often the case. However, the tire pressure monitoring sensor may also fail by reporting incorrect tire pressures. This could cause a flat tire to go unrecognized, or a properly inflated tire to signal a low or high tire pressure warning.

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.

Wheels offer very few symptoms, but these symptoms should never be ignored. Visible cracks on the wheels may appear, especially after hitting a large bump, Most often, this will also be accompanied by loss of air from the tire on that wheel. Also, vibration in the steering wheel is very common when the tire is out of balance, and improper wheel nuts or bolts can cause creaking and popping noises to develop. Again, there are very few symptoms, but they should not be ignored.

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 steps should I take to diagnose the tire pressure warning light issue on my 2020 Ford Mustang?

When diagnosing the tire pressure warning light issue on your 2020 Ford Mustang, it's essential to adopt a systematic approach that prioritizes simpler solutions before delving into more complex diagnostics. Begin by checking the tire pressure in all four tires with a reliable tire pressure gauge, ensuring that the readings align with the recommended levels found in your vehicle's manual. This initial step can often resolve the issue if the pressure is simply low. Next, inspect the tires for any visible damage, such as punctures or bulges, which could indicate a leak. If the tires appear intact, proceed to reset the tire pressure monitoring system as outlined in your owner's manual; this can help eliminate false alerts caused by system glitches. Additionally, examine the valve stems for any signs of wear or leaks, as these can also contribute to pressure loss. If, after these steps, the warning light remains illuminated, it may be time to consult a mechanic or dealership for a comprehensive inspection, as there could be underlying issues with the tire pressure monitoring system that require professional attention. By following this diagnostic approach, you can effectively troubleshoot the warning light and ensure your Mustang remains safe and roadworthy.

What could cause the tire pressure warning light to stay on in a 2020 Ford Mustang?

When the tire pressure warning light remains illuminated in your 2020 Ford Mustang, it can be frustrating, but understanding the common problems can help you troubleshoot effectively. One of the primary culprits is low tire pressure, which can occur due to a slow leak, temperature fluctuations, or simply not having the tires inflated to the recommended levels. It's essential to regularly check the tire pressure and ensure all tires are properly inflated according to the specifications in your vehicle's manual. Another potential issue could be a faulty tire pressure sensor. If the sensor is malfunctioning, it may not accurately relay the tire pressure information, causing the warning light to stay on. Additionally, the sensor's battery could be dead, which would prevent it from transmitting data. If you suspect this is the case, replacing the sensor battery may resolve the issue. Lastly, electrical problems within the vehicle, such as wiring issues or a blown fuse, can disrupt the tire pressure monitoring system's functionality. If you've checked the tire pressure and sensors but the light remains on, it may be wise to consult a professional to inspect the electrical system. By addressing these common problems, you can effectively troubleshoot the tire pressure warning light and ensure your Mustang remains safe and road-ready.

How urgent is it to address the tire pressure warning light that stays on in a 2020 Ford Mustang?

When the tire pressure warning light remains illuminated in your 2020 Ford Mustang, it is crucial to take immediate action. Ignoring this warning can lead to serious safety hazards, as improper tire pressure significantly impacts vehicle handling and stability, increasing the likelihood of accidents. Additionally, neglecting to address low tire pressure can result in uneven tire wear, which not only shortens the lifespan of your tires but also incurs higher replacement costs. Furthermore, underinflated tires can severely affect fuel efficiency, leading to increased fuel consumption and expenses over time. To ensure optimal performance, especially during emergency situations or adverse driving conditions, it is essential to regularly check and adjust your tire pressure. By promptly addressing the tire pressure warning light, you safeguard your safety, enhance your vehicle's performance, and protect your investment in your Mustang.

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