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Why is my TPMS light on but all my tires are fine?

If your Tire Pressure Monitoring System (TPMS) light is illuminated on your dashboard, but all your tires appear to be properly inflated, there could be a few potential reasons. The TPMS light is designed to alert you when one or more of your tires is underinflated, but it can also turn on for other issues not directly related to tire pressure.

Common Reasons for TPMS Light Activation

Faulty TPMS Sensor: Each of your vehicle's tires has a TPMS sensor that monitors the air pressure. If one of these sensors is malfunctioning, it can trigger the TPMS light even if the tire pressure is normal.

Sensor Battery Depletion: TPMS sensors have small batteries that eventually run out. When the battery dies, the sensor can no longer communicate with the vehicle's computer, causing the TPMS light to illuminate.

Sensor Damage or Displacement: If a TPMS sensor becomes damaged or is knocked out of position during a tire rotation or repair, it may not be able to accurately detect the tire pressure, leading to the TPMS light turning on.

Extreme Temperature Changes: Rapid changes in ambient temperature can cause the air pressure in your tires to fluctuate, which the TPMS may interpret as a problem, even if the pressure is still within the recommended range.

If your TPMS light is on but your tires appear properly inflated, it's best to have your vehicle inspected by a qualified mechanic. They can diagnose the underlying issue and determine if the TPMS sensors need to be repaired or replaced.

Resetting the TPMS Light

Once the root cause of the TPMS light has been addressed, you may need to reset the system to turn off the warning light. This is typically done by following the vehicle manufacturer's instructions, which often involve driving at a certain speed for a set distance or using a diagnostic tool to clear the TPMS trouble codes.

Maintaining proper tire pressure and addressing any TPMS-related issues promptly is important for both safety and fuel efficiency. If you have any further questions or concerns, don't hesitate to consult a professional mechanic.

Why is my low tire pressure warning light on but my tires are fine?

Possible TPMS sensor malfunction: Sensors can fail over time, especially in older vehicles. A malfunctioning sensor might falsely trigger the warning light. Delayed sensor reset: Even after adjusting the tire pressure, the TPMS might need a few miles of driving to reset.

Can AutoZone reset my TPMS sensor?

Yes, AutoZone can help you with TPMS issues. While they sell the necessary tools for you to reset the system yourself, they may not be able to perform the reset for you on the spot. You can visit an AutoZone store to get advice, purchase a TPMS tool, or have a technician look at it.
This video demonstrates how to reset the TPMS sensor without a tool: 58sAuto Repair GuysYouTube · Apr 12, 2020
How AutoZone can help with TPMS

They sell the tools: AutoZone has TPMS scan and programming tools, including those that can read and clear codes, and relearn sensor information, which you can use to reset the system yourself.
They offer advice: AutoZone staff can provide advice on how to troubleshoot and reset the TPMS light yourself.
They sell replacement parts: If you have a faulty sensor, AutoZone carries a wide variety of replacement TPMS sensors for different makes and models.
They can perform a professional reset: Some AutoZone locations or their professional network may offer services to diagnose and reset the TPMS system if you are unable to do it yourself.

You can watch this video to learn how to program a TPMS sensor using a tool: 59sAuto Repair GuysYouTube · Jun 7, 2022
What to do at AutoZone

If the light is still on after you have added air, the sensors may need to be reset or replaced.
Visit your local AutoZone to get a TPMS tool and follow the instructions to reset the system.
If you are unable to reset the light with a tool, you may have a faulty sensor that needs to be replaced.
Ask the AutoZone staff for assistance or advice, or ask if they can recommend a professional shop in their network that can perform the service for you.

What if my TPMS light is on but the tire is okay?

A recalibration or reset of the TPMS system is often required in these situations. This can be done by following the instructions in your vehicle's owner's manual, or you may need to take the vehicle to a professional to reset the system using specialized tools.

How much should it cost to replace a tire pressure sensor?

Replacing a single tire pressure sensor (TPMS) typically costs $50 to $250, depending on factors like the vehicle make and model, sensor type, and labor costs. Replacing all four sensors can be more cost-effective per sensor, with total costs potentially ranging from $400 to over $950 depending on whether you buy OEM or aftermarket parts and the labor rate of the shop.
Cost breakdown

Parts: A single sensor can cost anywhere from $20 to over $100, with OEM sensors being more expensive than aftermarket options.
Labor: Expect to pay between $50 and $100 in labor per sensor for installation. Some shops may offer package deals for replacing all four at once.
Total cost for one sensor: Combining parts and labor, the cost for one sensor can range from $50 to $250.
Total cost for all four: Replacing all four sensors could cost $400 to $950 or more, especially at a dealership.

How to save money

Purchase parts yourself: Buy your own sensors from a parts store or online and have a tire shop install them.
Wait for new tires: If you plan to get new tires soon, replace the TPMS sensors at the same time to combine labor costs.
Shop around: Get quotes from different independent mechanics and tire shops, as prices can vary significantly.

Other considerations

Aftermarket vs. OEM: Aftermarket sensors can be cheaper, but they may have compatibility issues or a shorter lifespan.
Vehicle make and model: Luxury or newer vehicles may require more expensive or specialized sensors.
DIY: If you have the right tools, you can replace the sensor yourself, but you'll need a special tool to activate the new sensor after installation.

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.