2015 INFINITI Q40 Tire Pressure Warning Light Stays On

Resolve Tire Pressure Warning Light in 2015 INFINITI Q40

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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 2015 INFINITI Q40 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 2015 INFINITI Q40 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 in my 2015 INFINITI Q40?

To effectively diagnose the tire pressure warning light issue in your 2015 INFINITI Q40, begin with a thorough check of the tire pressure in all four tires using a reliable tire pressure gauge. Ensure that each tire is inflated to the recommended levels outlined in your vehicle's manual, as improper inflation is a common trigger for the warning light. Next, inspect the tires for any visible damage, such as punctures, cuts, or bulges, which could indicate a more serious problem. If the tires appear to be in good condition, proceed to reset the tire pressure monitoring system following the instructions in your owner's manual, as this can sometimes resolve temporary issues. Additionally, examine the valve stems for any signs of damage or leaks that might be causing the warning light to activate. If, after these steps, the warning light remains illuminated and you cannot identify the issue, it is wise to consult a mechanic or an authorized INFINITI service center for a professional diagnosis and repair. By systematically addressing these areas, you can effectively troubleshoot the tire pressure warning light and ensure your vehicle's safety.

What could cause the tire pressure warning light to stay on in a 2015 INFINITI Q40?

When the tire pressure warning light stays on in a 2015 INFINITI Q40, it often indicates underlying issues that can be addressed through a DIY approach. Start by checking the tire pressure in all tires, as low pressure is the most common reason for the warning light to activate. If the pressure is within the recommended range, inspect the tire pressure sensors for any signs of damage or malfunction, as a faulty sensor can lead to persistent warning lights. Additionally, recalibrating the sensors may be necessary to ensure they are accurately reading the tire pressure levels. If these steps do not resolve the issue, investigate the vehicle's electrical system for potential wiring problems or blown fuses that could disrupt the tire pressure monitoring system. Lastly, if the problem persists, a malfunctioning control module might be at fault, and seeking professional assistance could be the best course of action. By methodically checking these components, you can effectively troubleshoot and potentially resolve the tire pressure warning light issue in your INFINITI Q40.

How urgent is it to address the tire pressure warning light that stays on in a 2015 INFINITI Q40?

Addressing the tire pressure warning light that remains illuminated in a 2015 INFINITI Q40 is of utmost urgency due to the significant safety risks and potential vehicle damage associated with neglecting this warning. When the tire pressure is not at the recommended levels, it can severely compromise the vehicle's handling and stability, particularly in emergency situations or challenging driving conditions. Furthermore, incorrect tire pressure can lead to uneven tire wear, which not only shortens the lifespan of the tires but also diminishes fuel efficiency, resulting in higher operating costs. The risk of tire failure, including dangerous blowouts, escalates with underinflated or overinflated tires, especially at high speeds. Additionally, maintaining proper tire pressure is essential for optimal vehicle performance, affecting braking distances and overall driving comfort. Ignoring this warning light can lead to costly repairs due to damage to tires, wheels, and suspension components. Therefore, it is crucial to check the tire pressure immediately, inflate the tires to the recommended specifications, and consult a qualified mechanic to diagnose and resolve any underlying issues to ensure safe and efficient driving.

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2015 INFINITI Q40 Tire Pressure Warning Light Solutions