2004 INFINITI Q45 Tire Pressure Warning Light Stays On

Common Causes for the Tire Pressure Warning Light in Your 2004 INFINITI Q45 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 2004 INFINITI Q45 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 2004 INFINITI Q45 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.

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 tire pressure warning light that stays on in a 2004 INFINITI Q45?

To effectively diagnose a tire pressure warning light that remains illuminated in your 2004 INFINITI Q45, begin with the most straightforward steps. First, manually check the tire pressure in all four tires, including the spare, ensuring they meet the manufacturer's recommended levels. This information is typically found in the owner's manual or on a sticker located inside the driver's side door jamb. 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. Don’t forget to examine the valve stems for leaks, as faulty stems can also cause pressure issues. If everything appears normal, consider resetting the tire pressure monitoring system, as this can sometimes clear persistent warning lights. If the light remains on after these checks, using a diagnostic tool to scan for fault codes related to the tire pressure monitoring system can provide further insights into the underlying problem. By following this methodical approach, you can effectively troubleshoot and potentially resolve the tire pressure warning light issue in your vehicle.

What could cause the tire pressure warning light to stay on in a 2004 INFINITI Q45?

When the tire pressure warning light stays on in a 2004 INFINITI Q45, it is essential to identify the underlying issues to resolve the problem effectively. The most common cause is low tire pressure, which can be easily checked using a tire pressure gauge. Ensuring that all tires are inflated to the recommended levels is the first step in troubleshooting. If the tire pressure is adequate, the next potential issue could be a faulty tire pressure sensor, which may need replacement if it is malfunctioning. Additionally, sensor calibration issues can occur, requiring a recalibration process to ensure accurate readings. Electrical problems, such as wiring issues or blown fuses, can also lead to the warning light remaining illuminated, necessitating a thorough inspection of the vehicle's electrical components. Lastly, a malfunction within the tire pressure monitoring system itself may be the root cause, which could require professional diagnosis and repair. By systematically addressing these common problems, you can effectively troubleshoot the tire pressure warning light issue in your INFINITI Q45.

How urgent is it to address the tire pressure warning light on a 2004 INFINITI Q45?

Addressing the tire pressure warning light on a 2004 INFINITI Q45 is an urgent matter that should not be overlooked. Ignoring this warning can lead to serious safety risks, as improper tire pressure significantly affects the vehicle's handling, braking, and overall stability. Additionally, driving with incorrect tire pressure can result in uneven tire wear, which not only shortens the lifespan of your tires but may also necessitate costly replacements sooner than expected. Furthermore, maintaining the correct tire pressure is essential for optimal fuel efficiency; underinflated tires can lead to increased fuel consumption, impacting your overall driving costs. The vehicle's performance is also at stake, as proper tire pressure ensures that the car handles well, especially in emergency situations. Lastly, neglecting the tire pressure warning can damage the Tire Pressure Monitoring System (TPMS), leading to further complications down the line. Therefore, it is crucial to check and adjust your tire pressure as soon as the warning light appears to ensure your safety and the longevity of your vehicle.

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2004 INFINITI Q45 Tire Pressure Warning Light Repairs