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A tire pressure monitoring system (TPMS) helps you track tire pressure and, on equipped systems, temperature while traveling. It can alert you to changing conditions that need attention, but it does not replace regular tire inspections or pressure checks with a gauge. In this guide, Master Technician Bart Taylor and Adam Peterson address common questions about monitoring tires, maintaining sensors and understanding your system’s settings.
Each tire needs attention, even when it looks properly inflated. A TPMS can help identify pressure loss in a monitored tire that might otherwise go unnoticed from the driver’s seat.
Include every RV tire when configuring your system. If you also want to monitor tow vehicle tires, confirm that compatible sensors are installed and assigned to the correct positions.
The spare matters too. Discovering that it is underinflated when you need it can complicate a roadside tire change. A spare will appear on the monitor only if it has a compatible, functioning sensor and your system supports that position.
Whether or not your spare has a sensor, include it in regular pressure checks. NHTSA recommends checking all tires, including the spare, at least monthly when cold.
Pressure readings help identify inflation changes. Temperature readings, when available, provide additional information about conditions at the sensor.
Excessive heat can accompany problems such as underinflation or overloading. However, a temperature reading alone does not diagnose the cause or confirm that a tire is safe.
Some pressure and temperature increases occur as tires warm during travel. Learn the normal behavior of your setup, but investigate alerts or unusual changes rather than assuming they are harmless.
Internal and external sensors measure temperature from different locations. Consult your system’s instructions when interpreting those readings.
Treat an unexpected reading as something to investigate rather than immediately assuming the sensor is wrong.
When safely parked:
Small differences do not automatically mean the system has failed. Tire temperature, gauge accuracy and the time between measurements can affect the comparison.
Persistent discrepancies, missing readings or erratic changes require troubleshooting. Follow your system’s instructions to check sensor pairing, battery condition and signal reception.
Slow gradually and stop in a safe location to assess the alert. Avoid abrupt braking or steering.
Check which tire and condition triggered the warning. Once safely parked, inspect the tire and verify pressure with a gauge when appropriate.
Do not silence an alert and continue without understanding the cause. If the tire is damaged, cannot retain pressure or shows signs of overheating, arrange appropriate service before continuing.
Battery life varies by sensor design, battery type, use and operating conditions. There is no single five-year estimate that applies to every system.
Some sensors have replaceable batteries. Others require replacement of the sensor when its battery is depleted. Check your specific model’s instructions for expected service life and replacement procedures.
Watch for low-battery warnings and missing readings rather than relying only on the sensor’s age.
Regularly check that all expected sensors report to the monitor. Inspect accessible external sensors for damage and follow the manufacturer’s maintenance schedule.
For sensors with replaceable batteries, use the specified battery and follow instructions for seals and reassembly. Correctly seated seals help protect the sensor from moisture.
Have internal sensor service performed by a qualified tire professional when access requires removing the tire from the wheel.
After tire service or rotation, confirm that the monitor’s wheel assignments still match the sensor locations.
Compatibility depends on the sensor design, valve stem specifications and operating pressure. Rubber and metal stems are not automatically interchangeable for every installation.
External sensors attach directly to the valve stem, so check whether the manufacturer permits your existing stems or requires a different type.
A sensor fitting onto the threads does not confirm that the installation is appropriate. Have a tire professional evaluate stems that are damaged or unsuitable for the sensor.
Many TPMS monitors support additional sensors, but compatibility and capacity vary.
Before purchasing, confirm that:
Follow the pairing instructions, then verify that each added sensor reports from the correct position.
First, confirm the correct cold inflation pressure for your RV and tow vehicle using their labels, manuals and applicable tire manufacturer guidance.
Then follow your TPMS manufacturer’s instructions for setting high-pressure, low-pressure and temperature alerts. A percentage recommended for one system should not be treated as a universal setting.
An alert threshold is not the target inflation pressure. Do not inflate tires to the low-pressure warning level or assume the monitor’s defaults match your RV.
Avoid raising thresholds simply to silence recurring alerts. Identify whether the cause is an incorrect setting, a tire condition or an equipment issue.
Your RV warranty and TPMS component coverage may have different terms. Coverage can depend on the equipment, model year, purchase date and cause of the concern.
Review your RV warranty documents and the TPMS manufacturer’s warranty information. Have the monitor and sensor identification details available when requesting assistance.
Yes. A TPMS supplements regular tire care. Continue inspecting your tires and checking cold inflation pressure with an appropriate gauge, including the spare.
Before travel, confirm that all expected sensor readings appear and investigate any missing readings or warnings.
Review your TPMS manual before your next trip to confirm maintenance requirements and alert settings.
Before travel, inspect your tires, verify cold inflation pressure with a gauge and confirm that all expected sensor readings appear. Correct inflation pressure comes from the applicable vehicle guidance, rather than simply using the maximum pressure molded into the tire sidewall.
Review your TPMS manual before your next trip to confirm sensor maintenance requirements and alert settings.
Disclaimer: The information contained in this article is deemed to be true and accurate at the time of publication. However, due to the evolving nature of our products and services, there may be changes or updates that occur after this article was published. We encourage users to verify the contents and consult with their dealer or Keystone RV for the most current information. If you have any questions or require further clarification, please do not hesitate to contact your dealer or reach out to Keystone RV directly.