2021 Ford Transit-350 HD Tire Pressure Warning Light Stays On

Resolve Tire Pressure Warning Light in 2021 Ford Transit-350 HD

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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 2021 Ford Transit-350 HD 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 2021 Ford Transit-350 HD 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 are the initial steps to diagnose a tire pressure warning light that stays on in a 2021 Ford Transit-350 HD?

When faced with a tire pressure warning light that remains illuminated in your 2021 Ford Transit-350 HD, the first step is to manually check the tire pressure in all tires, including the spare. Ensuring that each tire is inflated to the manufacturer's recommended levels is crucial, as this is often the simplest solution to the problem. Next, inspect the tires for any visible damage, such as cuts or punctures, which could lead to air loss and trigger the warning light. If the tire pressure is correct and the tires appear undamaged, consider resetting the tire pressure monitoring system (TPMS) as it may simply need recalibration. If the light persists, a malfunctioning tire pressure sensor could be the culprit, requiring the use of a diagnostic tool to pinpoint the issue. Should these steps not resolve the warning light, consulting a qualified mechanic is advisable, as they possess the expertise to address more intricate TPMS problems. By following this diagnostic approach, you can effectively troubleshoot the tire pressure warning light and maintain your vehicle's safety and performance.

What could cause the tire pressure warning light to remain on in a 2021 Ford Transit-350 HD?

When the tire pressure warning light stays illuminated in your 2021 Ford Transit-350 HD, it can be frustrating, but understanding the common problems can help you troubleshoot effectively. One of the primary culprits is low tire pressure, which is easily checked with a tire pressure gauge. Ensure all tires are inflated to the manufacturer's recommended levels, as even a slight deficiency can trigger the warning light. If the pressure is adequate, consider the possibility of a faulty tire pressure sensor; these sensors can wear out over time and may need replacement. Additionally, sensor calibration issues can arise, particularly if tires have been changed or rotated, necessitating a recalibration to ensure accurate readings. Electrical faults within the tire pressure monitoring system (TPMS) can also cause persistent warnings, often requiring diagnostic tools to pinpoint the issue. Lastly, be aware of any electronic interference or physical obstructions near the sensors, as these can disrupt the system's functionality. By systematically addressing these potential problems, you can effectively diagnose and resolve the tire pressure warning light issue in your vehicle.

What immediate steps should be taken to address the tire pressure warning light on a 2021 Ford Transit-350 HD?

When the tire pressure warning light illuminates on your 2021 Ford Transit-350 HD, it’s crucial to act promptly to avoid potential safety hazards and costly repairs. Start by checking the tire pressure of all tires, including the spare, using a reliable tire pressure gauge. Ensuring that each tire is inflated to the manufacturer’s recommended levels is essential for optimal vehicle performance and safety. If you find any tires underinflated, use an air compressor or portable inflator to bring them up to the correct pressure. Additionally, inspect each tire for visible damage such as punctures or bulges, as neglecting these issues can lead to blowouts or further tire degradation. Once you’ve addressed any pressure discrepancies or damage, don’t forget to reset the tire pressure monitoring system, which can typically be done via the dashboard controls or by following the instructions in your owner’s manual. Taking these immediate steps not only enhances your vehicle's safety but also prolongs the life of your tires, making it a vital DIY task for any responsible vehicle owner.

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