2016 BMW 640i Tire Pressure Warning Light Stays On

Common Causes for the Tire Pressure Warning Light in Your 2016 BMW 640i and How to Resolve Them

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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 2016 BMW 640i 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 tire 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 2016 BMW 640i 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 are the initial steps to diagnose a persistent tire pressure warning light on a 2016 BMW 640i?

To effectively diagnose a persistent tire pressure warning light on your 2016 BMW 640i, begin by checking the tire pressure in all four tires, ensuring they are inflated to the manufacturer's recommended levels. This simple step can often resolve the issue if the tires are under-inflated. Next, visually inspect each tire for any signs of damage or leaks, as punctures or wear can lead to pressure loss. If the tire pressure is correct and no visible damage is found, consider resetting the Tire Pressure Monitoring System (TPMS) sensor. This can typically be done by driving at speeds over 50 mph for about 10 minutes, which allows the system to recalibrate. For specific instructions on resetting the warning light, consult your owner's manual, as it may provide model-specific guidance. If the warning light remains illuminated after these steps, it may be time to seek professional assistance from a mechanic or a BMW service center to diagnose any underlying issues that may require expert attention. By following this structured approach, you can efficiently troubleshoot the tire pressure warning light and potentially save on repair costs.

What could be causing the tire pressure warning light to remain on in a 2016 BMW 640i?

When the tire pressure warning light remains illuminated in a 2016 BMW 640i, it is crucial to understand the common problems that could be at play. One of the primary issues could be a tire that is leaking air, which not only affects the tire's performance but also triggers the tire pressure monitoring system to alert the driver. Additionally, a faulty tire pressure reading can cause the warning light to stay on, indicating that the system is detecting an abnormality that requires attention. Another potential culprit is a malfunctioning sensor within the tire pressure monitoring system itself, which may fail to accurately report the tire pressure status. To effectively address the warning light, it is important to conduct a thorough inspection of the tires for leaks, check the tire pressure against manufacturer specifications, and ensure that the sensors are functioning correctly. Regular maintenance and prompt attention to these issues can significantly enhance the safety and performance of your vehicle.

What immediate steps should be taken to address the tire pressure warning light on a 2016 BMW 640i?

When the tire pressure warning light illuminates on your 2016 BMW 640i, it’s crucial to act swiftly to avoid safety risks and potential damage to your vehicle. Start by checking the tire inflation pressure against the recommended values found on the tire placard located on the driver’s door panel. Use a reliable tire pressure gauge to measure the air pressure in all four tires, ensuring they are inflated to the specified levels. If any tire is under-inflated, adjust the pressure accordingly. After correcting the tire pressures, access the iDrive system by pressing the MENU button, and navigate to the Vehicle Status section. Here, select Tire Pressure Monitor and perform a reset while ensuring the vehicle is stationary and in the correct gear. This reset is essential for the system to accurately reflect the new tire pressures. Finally, take your BMW for a short drive to allow the system to recalibrate. Addressing the tire pressure warning light promptly not only enhances your safety on the road but also helps maintain the longevity and performance of your vehicle.

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