2018 Toyota Corolla IM Tire Pressure Warning Light Stays On

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

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Reviewed by
Devin Cabugcal
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 iM 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 iM 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 iM?

To effectively diagnose the tire pressure warning light issue in your 2018 Toyota Corolla iM, 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 that each tire is inflated to the recommended PSI as indicated in your owner's manual or on the driver's side door jamb sticker. Next, conduct a thorough visual inspection of each tire for any signs of damage, such as punctures, cuts, or bulges, which could lead to air loss. If you find any tires underinflated, fill them to the correct pressure, and if any are overinflated, release some air to achieve the proper level. After adjusting the tire pressures, it’s important to reset the tire pressure monitoring system, which can typically be done through your vehicle's infotainment system or by following the specific instructions in the owner's manual. Don’t overlook the spare tire, as its pressure can also affect the warning light. If the warning light remains illuminated despite these checks, it may indicate a more complex issue with the tire pressure monitoring system itself, at which point seeking assistance from a certified mechanic or dealership is advisable for further diagnosis and repair. By following this diagnostic approach, you can efficiently address the tire pressure warning light issue and ensure your vehicle is safe to drive.

What could be causing the tire pressure warning light to remain on in a 2018 Toyota Corolla iM?

When the tire pressure warning light remains on in your 2018 Toyota Corolla iM, it’s essential to identify the underlying issues to ensure your safety and vehicle performance. The most common reason for this warning light is low tire pressure, which can be easily checked using a tire pressure gauge. If you find that the pressure is below the recommended levels, inflating the tires should resolve the issue. However, if the pressure is adequate, consider the possibility of a faulty tire pressure sensor, which may need replacement. Additionally, sensor calibration issues can lead to incorrect readings, so recalibrating the sensors according to the manufacturer’s guidelines might be necessary. It’s also important to inspect your tires for any leaks or punctures, as these can cause pressure drops and trigger the warning light. In some instances, electrical problems such as faulty wiring or a malfunctioning control module could be the cause, requiring professional diagnosis and repair. Lastly, be aware that extreme temperature fluctuations can impact tire pressure, making regular checks during these changes crucial for maintaining optimal tire health. By systematically addressing these potential causes, you can effectively troubleshoot the persistent tire pressure warning light and ensure your vehicle remains safe and roadworthy.

What immediate steps should be taken if the tire pressure warning light remains on in a 2018 Toyota Corolla iM?

When the tire pressure warning light remains illuminated in your 2018 Toyota Corolla iM, it is crucial to act promptly to ensure your safety and the vehicle's performance. Ignoring this warning can lead to dangerous driving conditions, such as reduced traction and increased tire wear, which may ultimately result in a blowout or loss of control. Start by checking the tire pressure in all four tires with a reliable gauge, ensuring they are inflated to the recommended levels found in your owner's manual or on the driver's side door jamb. If you discover any tires are underinflated, inflate them accordingly to help reset the tire pressure monitoring system. Additionally, inspect each tire for visible damage, such as punctures or cuts, as these can lead to air loss and compromise your safety. If the pressure is correct and no damage is evident, consider resetting the tire pressure monitoring system through your vehicle's settings. However, if the warning light persists despite these efforts, it is essential to consult a qualified mechanic or dealership to diagnose any underlying issues. Taking these immediate steps not only addresses the warning light but also safeguards your driving experience and prolongs the life of your tires.

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