2007 Mercury Grand Marquis Tire Pressure Warning Light Stays On

Resolve tire pressure warning light in 2007 Mercury Grand Marquis.

Find Repair Location
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 2007 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 2007 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.

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 on my 2007 Mercury Grand Marquis?

To effectively diagnose the tire pressure warning light issue on your 2007 Mercury Grand Marquis, 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 cause of the warning light. Next, inspect the tires for any visible damage, such as punctures, cuts, or bulges, which could also trigger the alert. If the tire pressure appears correct and the tires are in good condition, proceed to reset the tire pressure monitoring system (TPMS) according to the instructions in your vehicle's manual, as sometimes the system may simply need a refresh. Additionally, examine the TPMS sensors on each tire to confirm they are functioning properly, as faulty sensors can lead to false warnings. If these steps do not resolve the issue, it may be necessary to consult a mechanic or dealership for a professional diagnosis, ensuring that any underlying problems are addressed promptly. By following this diagnostic approach, you can systematically identify and resolve the cause of the tire pressure warning light.

What could be causing the tire pressure warning light to stay on in a 2007 Mercury Grand Marquis?

When the tire pressure warning light stays on in a 2007 Mercury Grand Marquis, it can be a source of concern for any DIY enthusiast. The first step is to check the tire pressure in all four tires, as low pressure is the most common reason for the warning light to illuminate. Make sure each tire is inflated to the recommended levels, which are typically found on a sticker inside the driver's door. If the tire pressure is adequate, the next area to investigate is the tire pressure sensors. A faulty sensor may not provide accurate readings, leading to the warning light remaining on. Additionally, consider the possibility that the sensor batteries need replacement, as they have a finite lifespan. If the sensors are functioning properly, recalibrating the tire pressure monitoring system may be necessary, and this can often be done by following the instructions in the vehicle's manual. If these troubleshooting steps do not resolve the issue, it may be wise to seek assistance from a professional mechanic to diagnose and potentially replace any malfunctioning components. Addressing these issues promptly is essential for ensuring the safety and performance of your vehicle.

How urgent is it to address the tire pressure warning light on a 2007 Mercury Grand Marquis that stays on?

Addressing the tire pressure warning light on a 2007 Mercury Grand Marquis is crucial for maintaining both safety and vehicle performance. Ignoring this warning can lead to serious safety concerns, as low tire pressure significantly impacts handling and braking, increasing the likelihood of accidents. Additionally, driving on underinflated tires accelerates uneven wear, which not only shortens the lifespan of your tires but also necessitates costly replacements sooner than expected. Furthermore, underinflated tires can reduce fuel efficiency, leading to higher fuel costs over time. The risk of tire damage, including blowouts, is another critical factor; continued driving with low pressure can compromise tire integrity, posing a danger to you and others on the road. Therefore, it is essential to check and adjust your tire pressure promptly according to the manufacturer's specifications. If the warning light persists after adjustments, it may indicate a deeper issue that requires professional inspection, underscoring the urgency of addressing this warning light without delay.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.

2007 Mercury Grand Marquis Tire Pressure Warning Light Guide