2018 Ford Flex Tire Pressure Warning Light Stays On

Common Causes of the Tire Pressure Warning Light in Your 2018 Ford Flex and How to Resolve Them

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Reviewed by
Aisha
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 Flex 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 Flex 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 2018 Ford Flex?

To effectively diagnose the tire pressure warning light issue on your 2018 Ford Flex, begin with a straightforward approach that prioritizes simple solutions before delving into more complex diagnostics. Start by checking the tire pressure in all four tires using a reliable tire pressure gauge, ensuring they are inflated to the levels recommended in your vehicle's manual. This initial step is crucial, as incorrect tire pressure is a common cause of the warning light activation. Next, inspect each tire for visible damage, such as punctures or bulges, which could indicate a more serious problem. If the tires appear to be in good condition and properly inflated, consider resetting the tire pressure monitoring system (TPMS) as outlined in your vehicle's manual, as this can sometimes resolve the issue. Additionally, don't overlook the spare tire; low pressure in this tire can also trigger the warning light. If, after these checks and adjustments, the warning light remains illuminated, it may be time to consult a mechanic for a comprehensive inspection, as there could be underlying issues that require professional attention. By following this diagnostic approach, you can efficiently address the tire pressure warning light concern and ensure your vehicle's safety on the road.

What could cause the tire pressure warning light to stay on in a 2018 Ford Flex?

When the tire pressure warning light stays on in a 2018 Ford Flex, it can indicate several underlying issues that need attention. The most common reason is low tire pressure, which can be easily resolved by checking and inflating the tires to the recommended levels. If the tire pressure is adequate, the problem may stem from a faulty tire pressure sensor that might require replacement. Additionally, the tire pressure monitoring system could need recalibration to ensure it provides accurate readings, a task that can often be performed by following the manufacturer's instructions. Electrical faults within the monitoring system or the vehicle's wiring may also cause the warning light to remain illuminated, which would necessitate a thorough inspection by a qualified mechanic. Lastly, a malfunctioning control module responsible for monitoring tire pressure could be the culprit, and replacing this component may be essential to turn off the warning light. Addressing these issues promptly is vital for ensuring the safety and optimal performance of your vehicle.

What should I do if the tire pressure warning light on my 2018 Ford Flex stays on?

When the tire pressure warning light on your 2018 Ford Flex remains illuminated, it is crucial to act swiftly to avoid potential safety hazards and costly repairs. Ignoring this warning can lead to decreased vehicle performance, increased tire wear, and even blowouts, which pose serious risks while driving. Start by checking the tire pressure in all tires, including the spare, to ensure they are inflated to the recommended levels. If you find any tires underinflated, inflate them accordingly, as proper tire pressure is essential for safe handling and fuel efficiency. Additionally, inspect your tires for any visible damage, such as punctures or leaks, which could compromise their integrity. If you make adjustments to the tire pressure or find any issues, remember to reset the tire pressure monitoring system as outlined in your owner's manual. However, if the warning light persists despite your efforts, it may indicate a more serious malfunction within the tire pressure monitoring system itself. In such cases, seeking professional assistance is advisable to prevent further complications and ensure your vehicle remains safe and reliable on the road. Taking these steps not only enhances your driving experience but also safeguards your well-being and that of others.

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