2021 Ram ProMaster 3500 Tire Pressure Warning Light Stays On

Address Tire Pressure Warning Light on 2021 Ram ProMaster 3500 for Safe Driving

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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 Ram ProMaster 3500 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 Ram ProMaster 3500 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 of a TPMS control module failure are failing to alert the driver of underinflation or overinflation of one or more tires, failure to communicate with the body control module or TPMS sensors, or erroneously reporting incorrect tire pressure.

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 2021 Ram ProMaster 3500?

To effectively diagnose the tire pressure warning light issue in your 2021 Ram ProMaster 3500, begin with the simplest and most straightforward approach. Start by checking the tire pressure in all tires, including the spare, using a reliable tire pressure gauge to ensure they meet the manufacturer's recommended levels. Next, visually inspect each tire for any signs of damage such as cuts, punctures, or bulges, as well as uneven wear that could suggest alignment problems. If the tire pressures are correct and the tires appear undamaged, proceed to reset the tire pressure monitoring system (TPMS) according to the instructions in your owner's manual, as this can often resolve minor issues. Should the warning light remain illuminated, it may indicate a malfunctioning tire pressure sensor, which would require professional assessment. Utilizing a diagnostic tool to scan for error codes can further assist in identifying the specific problem. If these steps do not yield a solution, consulting a professional mechanic or dealership is advisable for a thorough diagnosis and repair. By following this structured approach, you can efficiently address the tire pressure warning light issue and ensure your vehicle's safety and performance.

What could cause the tire pressure warning light to remain on in a 2021 Ram ProMaster 3500?

When the tire pressure warning light remains on in a 2021 Ram ProMaster 3500, it can signal several underlying issues that are manageable for DIY enthusiasts. The most common cause is low tire pressure; therefore, the first step is to check each tire and inflate them to the recommended levels. If the pressure is adequate, the next area to investigate is the tire pressure sensors, as a malfunctioning sensor may need replacement. Additionally, recalibrating the sensors can be necessary if they are not providing accurate readings, which is often a simple reset procedure. It's also important to examine the electrical components associated with the tire pressure monitoring system, as damaged wiring or blown fuses can disrupt functionality. If these steps do not resolve the issue, a more thorough inspection of the tire pressure monitoring system itself may be required to identify any malfunctions. By methodically addressing these potential problems, you can troubleshoot and resolve the persistent tire pressure warning light effectively.

What immediate steps should be taken to address the tire pressure warning light on a 2021 Ram ProMaster 3500?

When the tire pressure warning light illuminates on your 2021 Ram ProMaster 3500, it is crucial to act promptly to avoid serious safety risks and potential damage to your vehicle. Ignoring this warning can lead to reduced traction, increased tire wear, and even blowouts, which can compromise your safety on the road. Start by checking the tire pressure with a reliable gauge, ensuring all tires, including the spare, are inflated to the manufacturer's recommended levels. If you find any tires underinflated, use an air compressor to bring them up to the correct pressure. Additionally, inspect each tire for visible damage such as punctures or bulges, as these can exacerbate the problem and require immediate attention. Once you have adjusted the tire pressure, resetting the tire pressure monitoring system (TPMS) is essential to clear the warning light. If the light remains on despite your efforts, it is advisable to consult a professional mechanic to diagnose any underlying issues with the TPMS. Taking these steps not only enhances your safety but also prolongs the life of your tires and vehicle.

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