2018 Toyota Highlander Tire Pressure Warning Light Stays On

Resolve Tire Pressure Warning Light in 2018 Toyota Highlander for Safe Driving

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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 2018 Toyota Highlander 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 Toyota Highlander 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 Toyota Highlander?

To effectively diagnose the tire pressure warning light issue on your 2018 Toyota Highlander, begin with the simplest and most straightforward approach. Start by checking the tire pressure in all four tires using a reliable tire pressure gauge, ensuring they are inflated to the levels recommended in your vehicle's manual. This initial step can often resolve the warning light if the tires are under-inflated. 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 according to the instructions in your manual, as this can sometimes clear false alerts. Additionally, examine the valve stems for any signs of damage or leaks that might be triggering the warning light. If, after completing these steps, the warning light remains illuminated, it may be time to consult a mechanic or dealership for a comprehensive diagnosis, as there could be underlying issues that require professional attention. By following this diagnostic approach, you can systematically address the tire pressure warning light issue and ensure your vehicle's safety on the road.

What could be causing the tire pressure warning light to stay on in a 2018 Toyota Highlander?

When the tire pressure warning light remains on in your 2018 Toyota Highlander, it can be frustrating, but understanding the common problems can help you troubleshoot effectively. One of the primary culprits is low tire pressure, which is easily rectified by checking and inflating your tires to the manufacturer's recommended levels. If the pressure is adequate, consider the possibility of a faulty tire pressure sensor; these sensors can malfunction and may require replacement. Additionally, the sensor's battery could be low or dead, necessitating a battery replacement to restore functionality. It's also wise to inspect the wiring and connections associated with the tire pressure monitoring system, as damaged or loose connections can trigger the warning light. Lastly, if all else seems in order, recalibrating the tire pressure monitoring system according to the manufacturer's guidelines may resolve the issue. If the warning light persists after these checks, consulting a qualified mechanic is advisable to diagnose any underlying problems.

What should I do if the tire pressure warning light on my 2018 Toyota Highlander stays on?

If the tire pressure warning light on your 2018 Toyota Highlander stays illuminated, it’s essential to take immediate action to ensure your safety and prevent further complications. Begin by checking the tire pressure of all four tires with a reliable gauge, as driving on underinflated tires can lead to decreased handling and increased tire wear. If you discover any tires are below the recommended pressure, inflate them to the specified levels, which can typically be done at a nearby gas station. Additionally, carefully inspect each tire for any visible damage, such as punctures or cuts, as these can significantly affect tire performance and safety. Once you’ve made the necessary adjustments, you may need to reset the tire pressure monitoring system; consult your owner's manual for detailed instructions on how to do this. It’s crucial not to ignore the warning light, as neglecting it can result in serious issues like tire blowouts or damage to the monitoring system itself. If the light remains on after your checks, seeking professional assistance is advisable to address any underlying problems. By taking these proactive steps, you not only enhance your driving safety but also contribute to the overall longevity of your tires and vehicle.

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