2020 BMW I8 Tire Pressure Warning Light Stays On

Troubleshooting the Persistent Tire Pressure Warning Light in Your 2020 BMW i8: Causes and Solutions

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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 2020 BMW i8 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 2020 BMW i8 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 are the first steps to diagnose a persistent tire pressure warning light on a 2020 BMW i8?

When faced with a persistent tire pressure warning light on your 2020 BMW i8, the first step is to check the tire pressure across all four tires, ensuring they are inflated to the levels specified in your owner's manual. This simple check can often resolve the issue, as low tire pressure is a frequent culprit. Next, visually inspect each tire for any signs of damage, such as punctures or bulges, which could lead to air loss and trigger the warning light. If the tires appear to be in good condition, proceed to reset the tire pressure monitoring system following the manufacturer's instructions, as this can clear any false alerts. Additionally, examine the valve stems for leaks or damage, as faulty stems can also contribute to inaccurate pressure readings. If, after these steps, the warning light remains illuminated, it may be time to consult a certified mechanic who can perform a more detailed diagnosis using specialized tools. By systematically addressing these potential issues, you can effectively troubleshoot the tire pressure warning light on your BMW i8.

What could be causing the tire pressure warning light to stay on in a 2020 BMW i8?

When the tire pressure warning light stays on in your 2020 BMW i8, it’s essential to identify the underlying issues that may be causing this alert. The most frequent reason is low tire pressure, which can be easily checked using a tire pressure gauge. If you find that the pressure is below the manufacturer’s recommended levels, inflating the tires should resolve the warning light. However, if the pressure is adequate, the issue might stem from a faulty tire pressure sensor that may need replacement. Additionally, sensor calibration can sometimes be off, requiring a visit to a BMW service center for proper recalibration. It’s also important to inspect your tires for any leaks or punctures, as these can lead to a drop in pressure and trigger the warning light. Seasonal changes in temperature can further complicate tire pressure, particularly in colder months when pressure tends to decrease. Lastly, consider the possibility of electrical issues within the tire pressure monitoring system (TPMS), which may necessitate professional diagnosis. By addressing these common problems, you can effectively troubleshoot the persistent tire pressure warning light in your BMW i8.

What should I do if the tire pressure warning light stays on in my 2020 BMW i8?

When the tire pressure warning light remains illuminated in your 2020 BMW i8, 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 tire blowouts, which pose serious risks while driving. Start by checking the tire pressure in all four tires with a reliable gauge, ensuring they meet the specifications outlined in your owner's manual. If you find any tires are underinflated, inflate them to the recommended levels, as this simple step can often resolve the warning light issue. After adjusting the tire pressure, you may need to reset the tire pressure monitoring system through your vehicle's onboard computer. Additionally, inspect your tires for any visible damage, such as punctures or leaks, which could also trigger the warning light. If the light persists despite these efforts, it is advisable to consult a professional mechanic or an authorized BMW service center to diagnose and address any underlying issues. Taking these proactive measures not only enhances your safety on the road but also helps maintain the longevity and performance of your vehicle.

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