Why TPMS Sensors Fail & What to Do
Why TPMS Sensors Fail & What to Do
If your TPMS sensor is not working, dropping out, or showing incorrect readings, you are not alone. Touring conditions in Australia can expose weaknesses in tyre pressure monitoring systems. This guide explains the most common causes of TPMS sensor failure and how to fix them.
1. Flat or Weak Sensor Battery
The most common cause of TPMS sensor failure is battery depletion. As the battery weakens, the sensor may drop signal intermittently or stop transmitting entirely.
What to do:
- Replace the battery if your sensor allows it
- If sealed, replace the entire sensor
- Re-pair the new sensor with your monitor
2. Water or Dust Ingress
External TPMS sensors are exposed to rain, mud, and road grime. If seals degrade, moisture can enter the sensor housing and damage electronics.
What to do:
- Inspect O-rings and seals
- Replace damaged seals immediately
- If corrosion is visible, replace the sensor
3. Signal Dropout While Towing
Caravans increase distance between rear wheels and the cabin display. Weak transmission or interference may cause temporary TPMS signal loss.
What to do:
- Re-seat the sensor securely
- Check monitor antenna positioning
- Re-pair the sensor to refresh signal
4. Incorrect or Unstable Pressure Readings
If pressure readings fluctuate excessively or do not match manual gauge checks, the sensor may be failing or improperly seated.
What to do:
- Confirm manual tyre pressure with a gauge
- Remove and reinstall the sensor
- Replace the sensor if inconsistencies continue
5. Physical Damage
Road debris, curb contact, or rough tracks can damage TPMS sensors. Cracks or bent threads may cause leaks or sensor malfunction.
What to do:
- Inspect sensor body carefully
- Replace damaged units immediately
- Carry a spare sensor when touring remotely
How to Prevent TPMS Sensor Failure
- Check sensors before long trips
- Keep valve threads clean
- Replace seals periodically
- Store spare batteries or sensors when travelling
- Confirm stable readings before extended highway drives
Need a Replacement TPMS Sensor?
If your TPMS sensor has failed, explore reliable caravan-ready replacement options designed for Australian touring.
View TPMS Sensors AustraliaTPMS Sensor Failure FAQs
Why does my TPMS sensor keep disconnecting?
Low battery, signal interference, or loose seating are the most common causes.
How long should a TPMS sensor last?
Most external sensors last several years depending on usage and conditions.
Can I drive if one TPMS sensor fails?
You can drive, but you lose monitoring on that tyre. Replace it as soon as possible.
