Tire Pressure Light Still On After Filling Tires: Reasons And Fixes

Maintaining the proper tire pressure of the vehicles is crucial to ensure safety and proper handling on the roads. The tire pressure light comes on to indicate owners about any problem with the pressure of the tires. However, at times, the light remains on even when the tires are filled. 

Now, there are quite a few reasons why the tire pressure light still on after filling tires. There are several reasons behind it. Most of them are not that complex, by the way.

In this guide, we will explore the reasons behind the problem. We will also talk about the details of how you can diagnose and solve the issue without much trouble. So, stay tuned till the end!

6 Reasons Why Tire Pressure Light Still On After Filling Tires

As discussed earlier, there are quite a few reasons that cause the tire pressure light to remain on even after you fill the tires. Usually, these reasons include-

• the change in temperature
• overinflated tires
• dead TPMS battery
• faulty sensors
• slow leaks
• electrical issues

1. Temperature Changes

Changes in the outside temperature will often cause a significant impact on the tire pressure. When the temperature is colder, tire pressure usually drops, whereas tire pressure often increases during the warm temperature.

The owner may fill the tires when it is warm outside, and then the temperature drops. In cases like these, the tire pressure decreases and triggers the tire pressure warning light to come on.

Solution:

After checking the tire pressure of the vehicle, fill the tires to the recommended level if the pressure is too low. To know the suggested level, check the owner’s manual of the car. 

You can also rely on the information provided on the sticker on the driver’s side door jamb for the recommended pressure level. Checking the tire pressure when the tires are cold is essential. This is because driving often causes the tires to heat up and increase the pressure. 

2. Overinflated Tires

Overinflating the vehicle’s tires will also cause the tire pressure warning light to come on. This is because overinflation causes the tire to become stiff and increases the chances of damage. 

On top of that, these tires often reduce contact with the surface. And this increases the risk of accidents due to bad handling, breaking, etc. 

Solution:

Check the tire pressure of all the tires and see whether they are at the recommended level. Make sure to use a tire pressure gauge (Our pick) to check the tire pressure and ensure that it is filled up to the recommended level. If you notice that the pressure in any of the tires is high, deflate the tires to the recommended tire pressure level.

To do this, remove the valve stem of the tire and release some of the air. Make sure that you deflate the tires until you reach the recommended level. 

3. Dead TPMS Battery

The TPMS uses sensors to monitor the pressure in the tires properly. And each of these sensors is powered by a battery. When the battery dies, the TPMS fails to monitor the pressure correctly and sends the wrong signals. 

Dead batteries in the sensors will trigger the pressure warning light to stay on even though the tires are properly filled.

Solution:

The Tire Pressure Monitoring System is probably responsible if there are no issues or problems with the tires. Ensure that you check the TPMS properly and the battery is dead or not. Replace the old dead batteries with new ones to ensure smooth operation. 

4. Faulty Sensors

The sensors that help the TPMS to work properly often fail or lose their functionality over time. A faulty sensor in the system will cause the tire pressure warning light to stay on even if the tires are filled.

Solution:

Check the sensors connected to the TPMS and ensure that they are properly working. If any of the sensors are faulty, you can replace it with a new sensor (our pick) to ensure the best and most reliable TPMS reading. 

Resetting the TPMS after rotating or replacing the tires, TPMS maintenance, and so on, is a must. It is also essential if you make any changes or maintenance work on the tires or TPMS. Check the owner’s manual to learn how to reset the system and follow the instructions accordingly.

5. Slow Leak

Slow and small leaks in the tire are quite difficult to detect. However, this problem can cause tire pressure to drop slowly over time. And this will result in the tire pressure warning light turning on.

Solution:

Slow leak is easy to fix. In this case, repairing the tire or replacing it is a must. However, refilling the tire is a temporary solution to the problem.

6. Electrical Issue

Electrical problems in automobiles are quite common. These problems also often cause the TPMS system to display the warning sign for no reason. This is because wiring issues or vehicle component trouble often prevents the TPMS system from monitoring properly. 

Solution:

Check the wiring and electrical components connected to the TPMS. If any of the components are worn out or lose connection with the system, repairing or replacing it is important for proper TPMS monitoring. 

If you want to know more about the tire pressure light remaining on even after filling the tires, watch this YouTube video:

frequently asked questions (FAQs)

Check these answers to the frequently asked questions on the issues to remove the confusion, if any!

Final Words

We hope now you know why the tire pressure light is still on after filling the tires. The problem is common in automobiles and can be solved easily. Ensure you carefully follow the above mentioned steps to diagnose and solve the issue. 

Do not forget to follow the instructions properly when resetting the system. And lastly, rely on a professional if you do not have the proper tools or knowledge for the work.