2018 Toyota Corolla Tire Pressure Warning Light Stays On

Tire Pressure Warning Light in 2018 Toyota Corolla: Causes and Solutions

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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 Corolla 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 Corolla 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 in my 2018 Toyota Corolla?

To effectively diagnose the tire pressure warning light issue in your 2018 Toyota Corolla, begin with a straightforward approach that prioritizes simple solutions before delving into more complex diagnostics. Start by checking the tire pressure in all four tires using a reliable tire pressure gauge, ensuring that the readings align with the recommended PSI specified in your vehicle's manual. Next, conduct a visual inspection of each tire for any signs of damage, such as punctures or bulges, which could indicate a problem. If you find that the tire pressure is low, fill the tires to the correct level; conversely, if the pressure is too high, release some air to achieve the appropriate PSI. After adjusting the tire pressure, it’s essential to reset the tire pressure monitoring system, which can typically be done through the dashboard controls or by following the instructions in your owner's manual. Finally, keep an eye on the tire pressure warning light to see if it turns off. If the light remains illuminated despite these efforts, it may signal a more complex issue with the tire pressure monitoring system that warrants professional attention. By following this methodical approach, you can efficiently address the warning light and ensure your vehicle's safety on the road.

What could cause the tire pressure warning light to stay on in a 2018 Toyota Corolla?

When the tire pressure warning light remains illuminated in a 2018 Toyota Corolla, it can be attributed to several common problems that DIYers can investigate. The most frequent culprit is low tire pressure, which can occur due to a puncture, slow leak, or simply the natural loss of air over time. It's essential to check each tire's pressure using a reliable gauge to ensure they are inflated to the manufacturer's recommended levels. If the pressure is adequate, the issue may lie with a faulty tire pressure sensor, which could be malfunctioning and failing to provide accurate readings. In some cases, the sensor's battery may need replacement, as these components have a limited lifespan. Additionally, electrical or wiring issues, such as damaged connections or blown fuses, can disrupt the tire pressure monitoring system's functionality. Lastly, if the system has been reset or tires have been changed, recalibrating the TPMS may be necessary to turn off the warning light. By systematically checking these factors, DIY enthusiasts can effectively diagnose and address the issue, ensuring their vehicle remains safe and reliable on the road.

How urgent is it to address the tire pressure warning light that stays on in a 2018 Toyota Corolla?

Addressing the tire pressure warning light in your 2018 Toyota Corolla is not just a matter of convenience; it is a critical safety issue that demands immediate attention. When this light remains illuminated, it signals that your tires may be underinflated, which can severely compromise your vehicle's handling and braking capabilities. This poses a significant risk, especially in emergency situations where quick response is essential. Moreover, driving on underinflated tires accelerates uneven wear, leading to premature tire replacement, which can be costly. Additionally, low tire pressure negatively impacts fuel efficiency, resulting in higher fuel costs over time. Ignoring this warning can also lead to tire damage, increasing the likelihood of a blowout while driving. Therefore, it is crucial to check your tire pressure, inflate your tires to the recommended levels, and inspect for any leaks or punctures as soon as the warning light stays on. If the light persists despite these measures, seeking professional assistance is advisable to uncover any underlying issues that could further jeopardize your safety and vehicle integrity.

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