Tire Pressure Sensor Fault in Mercedes-Benz GLA

The TPMS in the GLA Series is crucial for maintaining optimal tire pressure. However, the system can occasionally show a fault due to:

Low Tire Pressure: A small drop in pressure, often due to temperature changes, can trigger the alert.
Faulty or Damaged TPMS Sensors: Over time, sensors may become damaged or malfunction, especially after several years or during tire changes.
Battery Depletion: The small batteries in the TPMS sensors typically last 5-7 years. A dead battery will cause the sensor to fail.
Improper Reset After Tire Change: The system may need a manual reset after tire rotations or replacements.
Software Issues: Sometimes, false warnings are caused by software glitches, which may require an update or reset to fix.

Check Tire Pressure:
- Use a tire pressure gauge to check if all four tires are properly inflated according to the manufacturer’s recommendations (you can find this information inside the driver’s door or in the owner’s manual).
- Inflate or adjust the tires as necessary.
Reset the TPMS System:
- Turn the ignition to the ON position without starting the engine.
- Use the steering wheel controls to navigate to the “Service” menu on the digital dashboard.
- Scroll to “Tire Pressure” and select “Restart”.
- Confirm the reset and drive for a short while to allow the system to recalibrate.
Check TPMS Sensors:
- If the warning persists, one or more sensors may be damaged or the battery inside the sensor may be depleted.
- Visit a Mercedes-Benz service center to have the sensors tested and replaced if necessary.
Software Update:
- If sensor issues are ruled out, it could be a software problem. Check with your dealer to see if there are any available updates for the TPMS system.
Seek Professional Assistance:
- If resetting the system doesn’t resolve the issue, a professional diagnostic at a Mercedes-Benz service center can help pinpoint the root cause.