Why Would a TPMS Light Keep Coming On?

Jun 09, 2023

Published: July 31, 2023

Modified: August 2, 2023

One of the most common reasons for a TPMS light to keep coming on is low tire pressure. When the pressure in one or more of the tires drops below the recommended level, it triggers the TPMS sensor to alert the driver. This could be due to a slow leak, punctured tire, or simply neglecting regular tire maintenance.

Driving with low tire pressure can lead to a variety of problems, including reduced fuel efficiency, decreased traction, and increased risk of a tire blowout. It’s crucial to address this issue promptly to ensure your safety on the road and prevent further damage to the tires.

If your TPMS light is constantly illuminated, start by checking the tire pressure using a reliable gauge. Compare the readings with the manufacturer’s recommended pressure, which is typically located on a placard in the driver’s side door jamb or the vehicle’s manual. If any of the tires show significantly lower pressure, it’s essential to inflate them to the correct level.

Keep in mind that tire pressure can fluctuate with changes in temperature. In colder weather, the air inside the tires contracts, leading to lower pressure readings. Regularly monitoring and adjusting the tire pressure, especially during colder seasons, can help avoid unnecessary TPMS alerts.

In some cases, the low tire pressure issue may persist even after inflating the tires. This could indicate a slow leak or a problem with the TPMS sensor. If you suspect a leak, it’s advisable to have the tires inspected by a professional technician who can identify and repair any damages.

Correcting low tire pressure is crucial not only for the functionality of the TPMS system but also for your overall safety on the road. Monitoring tire pressure regularly and addressing any issues promptly will help ensure optimal tire performance and extend their lifespan.

If your TPMS light keeps coming on even after ensuring that tire pressure is at the correct level, a faulty TPMS sensor could be to blame. The TPMS sensor is responsible for detecting pressure changes in each tire and transmitting that information to the vehicle’s onboard computer.

A faulty sensor may provide inaccurate tire pressure readings, causing the TPMS light to illuminate unnecessarily. This can be frustrating and lead to confusion, as there may not be an actual problem with the tire pressure.

There are several reasons why a TPMS sensor may become faulty, including wear and tear over time or damage caused by road hazards or corrosion. Additionally, if the vehicle’s battery is nearing the end of its lifespan, it may affect the functioning of the sensor.

If you suspect a faulty TPMS sensor, it’s recommended to have your vehicle inspected by a professional technician. They have the necessary tools and expertise to diagnose any issues with the sensors and determine whether a replacement is needed.

Replacing a TPMS sensor can be a bit costly, as it requires the purchase of a new sensor and the labor involved in installation. However, it is essential for maintaining the proper functioning of the TPMS system and ensuring accurate tire pressure readings.

It’s worth noting that some sensors may need to be programmed or synced with the vehicle’s computer after replacement. This is typically done using specialized equipment, which a professional technician will have. Proper calibration is necessary to ensure accurate readings and prevent false alarms from the TPMS system.

If you suspect a faulty TPMS sensor, it’s important not to ignore the issue. Continuing to drive with a malfunctioning sensor can compromise your safety and lead to further problems down the road. Seeking professional attention and getting the sensor repaired or replaced will help restore the proper functioning of the TPMS system and provide peace of mind while driving.

A less common but still possible cause for a TPMS light repeatedly illuminating is a battery issue. The TPMS sensor relies on a small internal battery to power its operation. If this battery becomes weak or fails, it can cause the sensor to malfunction and trigger the TPMS light.

The lifespan of a TPMS sensor battery can vary depending on factors such as the make and model of the vehicle, driving conditions, and battery quality. On average, these batteries tend to last between 5 to 10 years. However, they can sometimes drain faster due to environmental factors or electrical problems.

If you suspect a battery issue, it’s advisable to have your vehicle inspected by a professional technician. They can test the battery voltage and determine whether it’s within the proper range. If the battery is low or depleted, they can replace it to resolve the TPMS light concern.

It’s important to note that replacing the TPMS sensor battery may require specialized tools or programming equipment, depending on the vehicle’s make and model. A professional technician will have the necessary resources to replace the battery properly, ensuring that the TPMS system functions correctly.

Regular vehicle maintenance, such as checking and replacing batteries as needed, can help prevent TPMS light issues due to battery failures. It’s recommended to include battery inspections as part of your routine vehicle check-ups and address any battery-related concerns promptly.

Driving with a malfunctioning TPMS due to a battery issue may compromise your ability to monitor tire pressure accurately. This can lead to potential safety risks and increased tire wear. Therefore, it’s crucial to address any battery-related TPMS concerns promptly and have the battery replaced if necessary.

Another factor that can cause the TPMS light to consistently illuminate is exterior interference. Sometimes, external sources can interfere with the signals between the TPMS sensors and the vehicle’s computer system, leading to false readings and triggering the TPMS warning light.

There are various external factors that can interfere with the TPMS system, including electromagnetic interference from nearby power lines or radio frequency signals. Additionally, aftermarket modifications such as installing metal valve stems or using tire sealants can also disrupt the sensor’s ability to transmit accurate readings.

In some cases, the interference may be temporary and resolve itself. For example, if you drive away from an area with strong electromagnetic fields or radio signals, the TPMS system may start functioning normally again. However, if the interference is persistent, it’s advisable to consult with a professional technician to diagnose and address the issue.

When experiencing persistent TPMS warnings due to exterior interference, the technician may recommend using shielded valve stems or other measures to mitigate electromagnetic interference. They may also suggest removing any aftermarket modifications that could be affecting the TPMS sensors’ operation.

It’s important to note that ensuring proper TPMS sensor installation and adherence to the manufacturer’s guidelines can help minimize the risk of exterior interference. Additionally, avoiding excessive use of tire sealants or other substances that can obstruct the sensors’ functionality is recommended.

If you suspect exterior interference as the cause of the TPMS light coming on repeatedly, it’s best to consult with a professional technician to accurately diagnose and resolve the issue. They can provide expert advice and implement appropriate solutions to minimize the impact of external factors on the TPMS system.

Occasionally, a TPMS light that continues to illuminate may be indicative of a system malfunction. This means that there could be an issue with the TPMS system itself, rather than with the tires or sensors.

A system malfunction can be caused by various factors, including electronic glitches, software errors, or a faulty TPMS module. These issues may prevent the TPMS system from accurately detecting tire pressure changes or communicating with the vehicle’s computer system.

If you suspect a system malfunction, it is recommended to have your vehicle inspected by a professional technician. They have the necessary diagnostic tools to identify any faults in the TPMS system and determine the appropriate course of action.

Diagnosing and fixing a TPMS system malfunction can be challenging, as it requires expertise and potentially specialized equipment. The technician may need to reset or recalibrate the TPMS system, update software, or replace faulty components, depending on the specific issue.

Keep in mind that addressing a system malfunction may incur higher costs compared to other TPMS-related issues. However, it is crucial to ensure the proper functioning of the TPMS system for accurate tire pressure monitoring and maintaining optimal vehicle safety.

Regular vehicle maintenance, including software updates and system checks, can help prevent or detect system malfunctions early on. Adhering to the recommended service intervals and promptly addressing any TPMS-related concerns can minimize the risk of a system malfunction.

If you suspect a system malfunction is causing the TPMS light to persistently illuminate, it is best to consult with a professional technician. They can diagnose the issue and implement the necessary repairs to restore the proper functioning of the TPMS system.

If your TPMS light keeps coming on even after addressing any tire or sensor issues, it is possible that a TPMS reset is required. This means that the system needs to be recalibrated to ensure accurate readings and proper operation.

A TPMS reset is often necessary after certain tire-related maintenance tasks, such as tire rotations, tire replacements, or adjusting tire pressures. These actions can affect the sensor readings and trigger the TPMS warning light.

Resetting the TPMS system can typically be done using the vehicle’s onboard computer or through a specific sequence of actions outlined in the vehicle’s manual. It is important to follow the manufacturer’s guidelines to ensure the reset is performed correctly.

If you are unsure of how to perform a TPMS reset or if the TPMS light continues to illuminate after attempting a reset, it is recommended to consult with a professional technician. They have the expertise and knowledge to perform the reset accurately and diagnose any underlying issues.

In some cases, a TPMS reset may require specialized equipment or software that is only available at authorized service centers or automotive shops. This is especially true for vehicles with more advanced TPMS systems.

Performing a TPMS reset when required is essential for maintaining the accuracy of the system and preventing false alarms. It ensures that the TPMS sensors and the vehicle’s computer are properly synchronized, allowing for accurate monitoring of tire pressures.

Remember that a TPMS reset is not a substitute for addressing any tire or sensor issues. If the TPMS light continues to come on after a reset, it’s important to thoroughly inspect the tires and sensors for any problems that need to be resolved.

Regular maintenance, including tire rotations and replacements, should be accompanied by a TPMS reset to ensure proper functionality. Consulting with a professional technician can provide the peace of mind that the reset is performed correctly and any underlying issues are addressed.

Improper tire installation can be a significant factor contributing to a TPMS light that keeps coming on. If the tires are not correctly installed, it can lead to issues with tire pressure readings, triggering the TPMS warning light.

There are several aspects of tire installation that should be considered to ensure proper functioning of the TPMS system. First, it is crucial to ensure that the tires are mounted correctly on the rims and that they are properly balanced.

Additionally, proper tire inflation is essential. If the tires are overinflated or underinflated, it can lead to inaccurate pressure readings and result in the TPMS light illuminating. It’s important to follow the manufacturer’s recommended tire pressure guidelines, usually found on a placard inside the driver’s door or in the vehicle’s manual.

Using the correct valve stems is another important factor in proper tire installation. The valve stems should be compatible with the TPMS sensors to ensure accurate readings. If incompatible valve stems are used, it can interfere with the TPMS system’s ability to monitor tire pressure correctly.

If you suspect that improper tire installation is causing the TPMS light to persistently illuminate, it is recommended to have your tires inspected by a professional technician. They can verify that the tires are mounted correctly, balanced, and inflated to the proper pressure.

In some cases, it may be necessary to remove and reinstall the tires following the correct procedures. This can help resolve any issues with tire installation that are triggering the TPMS warning light.

Regularly checking the tire installation, especially after tire rotations, replacements, or any maintenance that involves tire removal, can help prevent TPMS issues caused by improper installation. It is crucial to ensure that the tires are installed correctly to maintain the accuracy and functionality of the TPMS system.

By following proper tire installation procedures and consulting with a professional technician when needed, you can minimize the risk of false TPMS warnings due to improper tire installation. This will allow for accurate monitoring of tire pressures and help ensure a safe and smooth ride.

Temperature changes can play a significant role in triggering the TPMS light to come on repeatedly. Tire pressure is directly affected by temperature variations, and extreme changes can cause fluctuations that lead to incorrect readings and TPMS alerts.

When temperatures drop, the air inside the tires contracts, causing a decrease in tire pressure. Conversely, in warmer temperatures, the air expands, leading to higher tire pressure. These fluctuations are normal and can cause the TPMS light to illuminate momentarily.

However, if the TPMS light remains on consistently, regardless of temperature, it may indicate an underlying issue with the sensors or tire pressure. In this case, it is important to check the tire pressure using a reliable gauge and adjust it to the recommended level.

It is crucial to monitor tire pressure regularly, especially during temperature changes, and inflate or deflate the tires accordingly. This helps ensure that the tires are running at the manufacturer’s recommended pressure for optimal performance and safety.

Some vehicles have a TPMS system that can compensate for temperature changes and provide more accurate tire pressure readings. These systems take into account the ambient temperature and adjust the displayed pressure accordingly. However, it is still essential to monitor the actual tire pressure manually.

In colder climates, it is common for the TPMS light to come on during the winter months due to the lower temperatures. Regularly checking and adjusting tire pressure can help alleviate TPMS alerts caused by temperature changes.

Conversely, in hot summer months, the air inside the tires can expand due to higher temperatures, leading to higher tire pressures. It is important to check the tire pressure and release some air if needed to maintain the recommended pressure levels.

By being mindful of temperature changes and their impact on tire pressure, you can minimize false TPMS alerts caused by normal fluctuations. Regularly checking and adjusting tire pressure as needed will ensure reliable TPMS readings and smooth operation of your vehicle.

Tire replacement or rotation is another factor that can cause the TPMS light to illuminate repeatedly. During these maintenance procedures, the TPMS sensors may need to be recalibrated or reset to ensure accurate tire pressure readings.

When replacing tires, it is crucial to install TPMS sensors in the new tires if they are not already equipped with them. These sensors communicate with the vehicle’s computer system and provide real-time tire pressure data. Failure to install the sensors correctly can result in the TPMS light persistently illuminating.

After tire rotation, the TPMS sensors may need to be reprogrammed or recalibrated to match their new positions on the vehicle. If this step is skipped, the sensors may still detect the pressure levels from their previous positions, leading to inaccurate readings and TPMS alerts.

It’s important to follow the manufacturer’s guidelines or consult a professional technician when replacing or rotating tires to ensure proper TPMS sensor installation and calibration. They have the expertise and necessary tools to reprogram the TPMS system accurately.

In some cases, a TPMS reset or relearn procedure may be required after tire replacement or rotation. This procedure allows the TPMS system to learn the new tire positions and recalibrate the sensors accordingly.

Failure to perform a TPMS reset or relearn procedure after tire replacement or rotation can result in persistent TPMS alerts. If the TPMS light continues to illuminate after these procedures, it’s recommended to consult with a professional technician for further inspection and diagnosis.

Regularly scheduled tire rotations and tire replacements should be accompanied by the necessary TPMS recalibration procedures. This helps maintain accurate tire pressure readings and ensures the TPMS system functions correctly.

By following proper tire replacement and rotation procedures, including TPMS sensor installation and calibration, you can minimize the risk of false TPMS alerts. This ensures that tire pressure is accurately monitored for optimal performance and safety while driving.

Faulty wiring or connector issues can be a potential cause for the TPMS light to continuously come on. The sensors rely on a network of wires and connectors to transmit tire pressure data to the vehicle’s computer system. If there is a problem with the wiring or connectors, it can disrupt the communication and result in a persistent TPMS warning.

There are several possible reasons for faulty wiring or connector issues in the TPMS system. It could be due to wear and tear over time, damage caused by road hazards, or even rodents chewing on the wiring. Moisture exposure or corrosion can also affect the functionality of the wiring and connectors.

If you suspect faulty wiring or connector issues, it is recommended to have your vehicle inspected by a professional technician. They have the expertise to diagnose and repair any electrical issues within the TPMS system.

The technician will likely perform a thorough inspection of the TPMS wiring and connectors to identify any damaged or corroded areas. They may need to repair or replace the affected components to restore proper communication between the sensors and the vehicle’s computer system.

It’s worth noting that diagnosing and resolving faulty wiring or connector issues in the TPMS system can be complex. This may involve tracing the wiring through different parts of the vehicle and potentially disassembling certain components. Therefore, it is best to leave this task to a qualified technician who is experienced in handling electrical systems.

Regular vehicle maintenance and inspections can help detect potential wiring or connector issues early on. If you notice any warning signs such as intermittent TPMS warnings, flickering TPMS light, or other electrical malfunctions, it’s important to have your vehicle checked promptly.

By addressing faulty wiring or connector issues in the TPMS system, you can ensure accurate tire pressure monitoring and reduce the risk of false alarms. Proper functioning of the TPMS system is vital for maintaining optimal safety and performance while driving.