2010 Mercury Grand Marquis Tire Pressure Warning Light Stays On

Resolve tire pressure warning light on 2010 Mercury Grand Marquis.

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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 2010 Mercury Grand Marquis 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 2010 Mercury Grand Marquis 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 initial steps to diagnose a tire pressure warning light that stays on in a 2010 Mercury Grand Marquis?

When faced with a tire pressure warning light that remains illuminated in your 2010 Mercury Grand Marquis, the first step is to manually check the tire pressure in all four tires, including the spare. Using a reliable tire pressure gauge, ensure that each tire is inflated to the manufacturer's recommended PSI levels, as incorrect pressure can trigger the warning light. Next, visually inspect each tire for any signs of damage, such as punctures or bulges, which could indicate a loss of air. Don’t overlook the valve stems; ensure they are intact and free from damage, as faulty stems can lead to air leaks. Additionally, listen for any hissing sounds that might suggest a leak and visually check for any escaping air. If everything appears normal, consider resetting the tire pressure monitoring system (TPMS) according to your vehicle's manual, as this can sometimes resolve the issue. However, if the warning light persists after these checks, it may be time to consult a professional mechanic for a more comprehensive diagnosis. By following these steps, you can effectively troubleshoot the tire pressure warning light and ensure your vehicle's safety on the road.

What could be causing the tire pressure warning light to stay on in a 2010 Mercury Grand Marquis?

When the tire pressure warning light remains illuminated in a 2010 Mercury Grand Marquis, it can be attributed to several common problems that DIYers can investigate. First and foremost, low tire pressure is the most frequent culprit; checking each tire and inflating them to the manufacturer's recommended levels is a straightforward first step. If the pressure is adequate, the issue may lie with a faulty tire pressure sensor, which could require replacement if it is malfunctioning. Additionally, the sensors are equipped with batteries that can deplete over time, leading to false warnings if they are low or dead. Another potential issue is the need for system recalibration, which can ensure that the tire pressure monitoring system provides accurate readings. Furthermore, inspecting the tires for leaks or punctures is essential, as any damage can cause a drop in pressure and trigger the warning light. Lastly, examining the wiring and connections related to the tire pressure monitoring system for any faults or loose connections can help identify less common issues. By systematically addressing these potential problems, you can effectively troubleshoot and resolve the tire pressure warning light issue in your vehicle.

How urgent is it to address the tire pressure warning light on a 2010 Mercury Grand Marquis that stays on?

Addressing the tire pressure warning light on your 2010 Mercury Grand Marquis is an urgent matter that should not be overlooked. Ignoring this warning can lead to serious safety concerns, as low tire pressure significantly impacts your vehicle's handling and braking capabilities, increasing the risk of accidents. Additionally, driving on under-inflated tires can cause uneven wear, leading to premature tire damage or even a blowout, which can be catastrophic while driving. Furthermore, maintaining proper tire pressure is essential for optimal fuel efficiency; neglecting this can result in higher fuel costs over time. Lastly, a persistent warning light may indicate a malfunction in the tire pressure monitoring system (TPMS), which could prevent you from receiving accurate tire pressure readings in the future. Therefore, it is crucial to check your tire pressure regularly, inflate your tires to the recommended levels, and promptly address any underlying issues to ensure your safety and the longevity of your vehicle.

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2010 Mercury Grand Marquis Tire Pressure Light Issues