2018 Ford Transit-350 Tire Pressure Warning Light Stays On

Tire Pressure Warning Light in 2018 Ford Transit-350: Causes and Solutions

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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 2018 Ford Transit-350 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 2018 Ford Transit-350 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 in my 2018 Ford Transit-350?

To effectively diagnose the tire pressure warning light issue in your 2018 Ford Transit-350, begin with a thorough check of the tire pressure in all tires, including the spare. Utilizing a tire pressure gauge, ensure that each tire is inflated to the levels recommended in your owner's manual, as improper inflation is a common cause of warning lights. Next, inspect the tires for any visible damage such as punctures, cuts, or bulges, and look for any foreign objects that may be causing air loss. If the tire pressure is correct and the tires appear undamaged, consider resetting the tire pressure monitoring system (TPMS), as it may require recalibration after adjustments. If the warning light persists, the TPMS sensors could be malfunctioning, necessitating a professional inspection. Should these steps not resolve the issue, visiting a certified mechanic is advisable, as they possess the expertise and diagnostic tools to identify and rectify more complex problems. By following this systematic approach, you can efficiently address the tire pressure warning light and maintain your vehicle's safety on the road.

What are the common causes for the tire pressure warning light to remain on in a 2018 Ford Transit-350?

When the tire pressure warning light remains on in a 2018 Ford Transit-350, it’s crucial to identify the underlying issues that may be causing this alert. The most prevalent reason is low tire pressure, which can occur due to a slow leak, changes in temperature, or improper inflation. If the tire pressure is confirmed to be adequate, the next step is to inspect the tire pressure sensors, as a malfunctioning sensor may not provide accurate readings, thus keeping the warning light illuminated. Additionally, the sensors are powered by batteries, and if one is low or dead, it can also trigger the warning light. In some instances, the tire pressure monitoring system may need recalibration to ensure it operates correctly. Furthermore, electrical problems such as damaged wiring or poor connections can interfere with the system's functionality, leading to a persistent warning light. Lastly, external factors like interference or physical obstructions around the sensors can affect their ability to relay accurate tire pressure data. By methodically examining these common causes, you can effectively troubleshoot and resolve the issue of the tire pressure warning light in your Ford Transit-350.

What immediate steps should be taken if the tire pressure warning light remains on in a 2018 Ford Transit-350?

When the tire pressure warning light remains illuminated in your 2018 Ford Transit-350, it is crucial to act promptly to ensure your safety and prevent potential damage to your vehicle. Ignoring this warning can lead to decreased fuel efficiency, uneven tire wear, and even tire blowouts, which pose serious risks on the road. Start by checking the tire pressure in all tires, including the spare, using a reliable tire pressure gauge. If you find any tires are underinflated, inflate them to the recommended levels as specified in your vehicle's manual. Additionally, inspect each tire for visible damage such as punctures or bulges, as these can compromise your safety and require immediate attention. Once you have adjusted the tire pressures and checked for damage, reset the tire pressure monitoring system according to your owner's manual instructions. If the warning light persists despite these efforts, it is essential to consult a qualified mechanic to diagnose any underlying issues with the monitoring system. Taking these steps not only helps maintain your vehicle's performance but also ensures your safety on the road.

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