2018 Jeep Grand Cherokee Tire Pressure Warning Light Stays On

Resolve the Persistent Tire Pressure Warning Light in 2018 Jeep Grand Cherokee

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Reviewed by
Andrew Hajjar
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 2018 Jeep Grand Cherokee 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 2018 Jeep Grand Cherokee 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 on my 2018 Jeep Grand Cherokee?

To effectively diagnose the tire pressure warning light issue on your 2018 Jeep Grand Cherokee, begin with a thorough check of the tire pressure across all four tires. Utilize a reliable tire pressure gauge to ensure that each tire is inflated to the recommended PSI, which can be found in your owner's manual or on the sticker located on the driver's side door jamb. If the pressure is low, inflate the tires accordingly and monitor if the warning light turns off. Next, inspect the tires for any visible damage, such as punctures, cuts, or bulges, as these can lead to air leaks and trigger the warning light. If the tires appear to be in good condition, consider resetting the tire pressure monitoring system (TPMS) as it may require recalibration. Refer to your vehicle's manual for specific instructions on how to perform this reset. Additionally, examine the TPMS sensors on each tire for any signs of damage or corrosion, as faulty sensors can also cause the warning light to activate. If these steps do not resolve the issue, it may be time to consult a professional mechanic or dealership for a more in-depth diagnosis. By following this systematic approach, you can efficiently identify and address the cause of the tire pressure warning light on your Jeep Grand Cherokee.

What could cause the tire pressure warning light to stay on in a 2018 Jeep Grand Cherokee?

When the tire pressure warning light remains on in your 2018 Jeep Grand Cherokee, it can be frustrating, but understanding the common problems can help you diagnose the issue. One of the primary culprits is low tire pressure, which is easily checked with a tire pressure gauge. Ensure all tires are inflated to the manufacturer's recommended levels, as even a slight drop can trigger the warning light. If the pressure is adequate, consider the possibility of a faulty tire pressure sensor, which may require replacement if it fails to provide accurate readings. Additionally, sensor calibration issues can arise, necessitating a recalibration to ensure proper functionality. Electrical problems, such as wiring issues or blown fuses, can also lead to persistent warning lights, so a thorough inspection of the vehicle's electrical system is advisable. In some cases, the control module for the tire pressure monitoring system may be at fault, requiring repair or replacement. Lastly, be mindful of extreme temperature changes, as they can affect tire pressure and trigger the warning light. By systematically addressing these potential issues, you can effectively troubleshoot and resolve the tire pressure warning light concern in your Jeep Grand Cherokee.

How urgent is it to address the tire pressure warning light on a 2018 Jeep Grand Cherokee that stays on?

Addressing the tire pressure warning light on a 2018 Jeep Grand Cherokee that remains illuminated is an urgent matter that DIY enthusiasts should not overlook. Ignoring this warning can lead to serious safety concerns, as improper tire pressure significantly affects vehicle handling, braking, and overall stability, increasing the risk of accidents. Additionally, driving with incorrect tire pressure can cause uneven tire wear, which not only shortens the lifespan of your tires but also raises the likelihood of a blowout, putting you and your passengers in danger. Furthermore, maintaining the correct tire pressure is essential for optimal fuel efficiency; neglecting this can lead to increased fuel consumption, costing you more at the pump. Lastly, the Tire Pressure Monitoring System (TPMS) itself may be compromised if the warning light is ignored, potentially leading to more significant issues down the line. Therefore, it is crucial to promptly check and address any tire pressure discrepancies to ensure your vehicle remains safe, efficient, and in good working order.

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