2012 Lexus CT200h Tire Pressure Warning Light Stays On

Common Causes for the Tire Pressure Warning Light in Your 2012 Lexus CT200h and How to Resolve It

Find Repair Location
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 2012 Lexus CT200h 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 2012 Lexus CT200h 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 of a TPMS control module failure are failing to alert the driver of underinflation or overinflation of one or more tires, failure to communicate with the body control module or TPMS sensors, or erroneously reporting incorrect tire pressure.

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 are the initial steps to diagnose a tire pressure warning light that stays on in a 2012 Lexus CT200h?

To effectively diagnose a tire pressure warning light that remains illuminated in your 2012 Lexus CT200h, start by checking the tire pressure in all four tires, ensuring they are inflated to the manufacturer's recommended levels. This is a crucial first step, as low tire pressure is a frequent culprit for such warnings. Next, inspect each tire for any visible damage, including punctures, cuts, or bulges, which could lead to air loss. If the tire pressure is adequate and the tires appear undamaged, proceed to reset the tire pressure monitoring system by following the instructions in your vehicle's manual; this can often clear false alerts. If the warning light persists, it may indicate a malfunctioning tire pressure sensor, which can be diagnosed using a diagnostic tool to pinpoint the faulty sensor. Should these steps not resolve the issue, it may be necessary to consult a qualified mechanic for a thorough inspection and further diagnosis. By following this methodical approach, you can effectively troubleshoot the tire pressure warning light in your Lexus CT200h.

What could be causing the tire pressure warning light to stay on in a 2012 Lexus CT200h?

When the tire pressure warning light stays on in a 2012 Lexus CT200h, it indicates that there may be underlying issues that need to be addressed. The most common reason for this warning light is low tire pressure, which can be easily checked using a tire pressure gauge. Ensuring that all tires are inflated to the recommended levels is a crucial first step in troubleshooting the problem. If the tire pressure is adequate, the issue might stem from a faulty tire pressure sensor that may need replacement. Additionally, sensor calibration issues can occur, requiring a recalibration process to ensure accurate readings. Electrical faults within the tire pressure monitoring system can also trigger the warning light, often necessitating professional diagnostics to identify the specific problem. Furthermore, a slow leak in one of the tires can lead to a gradual loss of pressure, causing the warning light to activate. Regularly inspecting your tires for punctures or leaks can help prevent this issue. By addressing these potential problems, you not only enhance your vehicle's safety but also ensure optimal performance on the road. If the warning light remains illuminated after checking these factors, it is advisable to consult a qualified mechanic for a thorough diagnosis and repair.

How urgent is it to address the tire pressure warning light that stays on in a 2012 Lexus CT200h?

Addressing the tire pressure warning light in your 2012 Lexus CT200h is not just a matter of convenience; it is a critical safety concern that requires immediate attention. Ignoring this warning can lead to dangerous driving conditions, as improper tire pressure significantly affects vehicle handling and braking capabilities, increasing the likelihood of accidents. Additionally, neglecting to check your tire pressure can result in uneven tire wear, which not only shortens the lifespan of your tires but also leads to costly replacements. Furthermore, underinflated tires can severely impact your vehicle's fuel efficiency, causing you to spend more on gas over time. The importance of maintaining optimal tire pressure cannot be overstated, as it directly influences your vehicle's performance, especially in emergency situations where precise control is essential. Therefore, it is crucial to check and adjust your tire pressure promptly or consult a professional if the warning light remains illuminated, ensuring both your safety and the longevity of your vehicle.

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.