Why Do Both TPMS Sensors Fail After Changing Tires?

Introduction

Tire Pressure Monitoring System (TPMS) sensors are a critical component of modern vehicles, ensuring safety by monitoring tire pressure. However, it is not uncommon for both TPMS sensors to fail just after changing tires, which can be disconcerting for many drivers.

Common Causes of TPMS Sensor Failure

Improper Installation: If the tires were not installed correctly, the sensors could have been damaged during the process. This can occur in a hurry or due to lack of expertise, leading to sensor failure.

Battery Life: TPMS sensors have built-in batteries that have a limited lifespan. If the sensors were already old, they might fail around the time of the tire change. This is particularly true if they were not replaced regularly.

Interference: Sometimes, during the relearming process after a tire change, the sensors may not communicate properly with the vehicle's system. This could cause interference and trigger a sensor failure.

Faulty Sensors: It is possible that the sensors were faulty before the tire change and just coincidentally failed afterward. This could be due to pre-existing damage or manufacturing defects.

Environmental Factors: Extreme temperatures or exposure to harsh conditions during tire changes can also affect sensor functionality. For instance, exposure to water, dust, or corrosive substances can damage the sensors over time.

What to Do if Both Sensors Fail

Encountering a situation where both TPMS sensors fail at the same time is concerning, but it does not necessarily mean there is a significant underlying issue. It is advisable to have the sensors checked by a professional to diagnose the exact problem and ensure proper function.

Recalibrating TPMS Sensors

Recalibating TPMS sensors is often necessary, especially if there are inconsistencies in pressure readings. While manuals are the best source for guidance, many drivers find it helpful to refer to online vehicle manuals for step-by-step instructions. It's important to remember that pressure readings from TPMS sensors are not exact measurements, but rather estimates. A visual check of the vehicle and a comparison with a gauge can provide additional reassurance.

Ensuring Proper Tire Maintenance

While recalibrating the sensors is important, maintaining proper tire pressure is only the first step. Here are some additional tips to keep in mind:

Visual Check: Always perform a visual check/walk around of your vehicle when you can. This includes checking lug nuts to ensure they are tight and haven't been tampered with. A loose or missing lug nut can be dangerous and may cause fatalities to pedestrians. Check Lug Nuts: Many people don't know the proper way to tighten lug nuts, leaving the vehicle vulnerable to theft or tampering. It's crucial to ensure all lug nuts are tightened properly. Carry a Gauge: When you have the opportunity, use a pressure gauge to compare readings between the TPMS and your own gauge. This can help identify any inconsistencies. Adjust the Valve Handle: If needed, adjust the valve handle to ensure proper sealing and pressure retention.

Conclusion

Both TPMS sensors failing after changing tires is a concerning issue, but it can often be resolved with proper diagnosis and maintenance. By understanding the common causes of sensor failure and taking proactive steps to maintain your tires, you can ensure the safety and reliability of your vehicle.