2019 BMW 640i Gran Coupe Tire Pressure Warning Light Stays On

Resolve Tire Pressure Warning Light in 2019 BMW 640i Gran Coupe

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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 2019 BMW 640i Gran Coupe 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 2019 BMW 640i Gran Coupe 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 on my 2019 BMW 640i Gran Coupe?

To effectively diagnose the tire pressure warning light issue on your 2019 BMW 640i Gran Coupe, start with a manual check of the tire pressure using a reliable gauge. This initial step is crucial as it allows you to compare the readings against the recommended levels found in your owner's manual or on the sticker located inside the driver's side door jamb. If the tire pressures are within the acceptable range, proceed to inspect each tire for any visible damage, such as punctures or bulges, which could indicate a loss of air. If no physical issues are detected, the next step is to reset the Tire Pressure Monitoring System (TPMS), as sometimes the warning light can be triggered by a temporary glitch. Refer to your owner's manual for specific instructions on how to perform this reset. If the warning light persists after these steps, it may be time to consult a professional mechanic or a BMW dealership, as they possess the specialized tools necessary for a more in-depth diagnosis. Additionally, consider the possibility of faulty tire pressure monitoring sensors, which may require replacement if they are found to be malfunctioning. By following this structured approach, you can systematically address the tire pressure warning light issue and ensure your vehicle's safety and performance.

What could cause the tire pressure warning light to stay on in a 2019 BMW 640i Gran Coupe?

When the tire pressure warning light stays on in a 2019 BMW 640i Gran Coupe, it is essential to diagnose the underlying issue to maintain vehicle safety and performance. The most common cause is low tire pressure, which can be easily checked with a tire pressure gauge; ensuring all tires are inflated to the recommended levels is vital. If tire pressure is adequate, the problem may stem from a faulty tire pressure sensor that might need replacement. Additionally, the sensors could require recalibration to provide accurate readings, a process best handled by a professional technician. Electrical faults within the tire pressure monitoring system can also trigger the warning light, necessitating a diagnostic scan to identify the specific issue. Lastly, a malfunction within the tire pressure monitoring system itself may be responsible, requiring a thorough inspection and potential repairs. Addressing these concerns promptly not only enhances safety but also ensures optimal driving performance, making it crucial for DIY enthusiasts to be aware of these common problems.

How urgent is it to address the tire pressure warning light on a 2019 BMW 640i Gran Coupe?

Addressing the tire pressure warning light on a 2019 BMW 640i Gran Coupe is an urgent matter that should not be overlooked. Ignoring this warning can lead to serious safety concerns, as improper tire pressure significantly affects the vehicle's handling, braking, and overall stability, increasing the risk of accidents. Additionally, driving with incorrect tire pressure can result in uneven tire wear, which not only shortens the lifespan of your tires but also diminishes fuel efficiency, leading to higher fuel costs over time. The risk of tire damage, such as blowouts or flats, escalates with low tire pressure, particularly when driving at high speeds or on uneven surfaces. Furthermore, maintaining the correct tire pressure is essential for optimal vehicle performance, ensuring better traction and cornering capabilities. Therefore, it is crucial to take immediate action when the tire pressure warning light illuminates, safeguarding both your safety and the longevity of your vehicle.

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