Understanding the Tire Pressure Sensor in the Ford Fiesta
The Ford Fiesta uses a Tire Pressure Monitoring System (TPMS) to alert you when tire pressure is too low. However, sometimes the system can throw a false alert or display a “Tire Pressure Sensor Fault” warning even if there isn’t an actual issue with your tire pressure. Let’s go through the key troubleshooting steps to fix this!
1. Check Tire Pressure and Adjust as Needed
Before diving into any technical troubleshooting:
- Verify the pressure in each tire with a tire gauge, ensuring it matches the recommended levels (check the driver’s door placard or manual for exact numbers).
- Inflate or deflate tires as necessary, then drive the car at least 15-20 minutes to allow the system to recalibrate.
2. Perform a TPMS Reset
- Turn on the Ignition: Without starting the car, turn the key to the “On” position.
- Press the Hazard Lights Button three times quickly to enter the TPMS reset mode.
- You should see an alert to begin resetting each tire sensor. Follow prompts to release air or use a TPMS relearn tool if available.
3. Drive the Vehicle to Recalibrate
After resetting, drive at a consistent speed (above 20 mph) for about 10-15 minutes. This process allows the TPMS to detect all sensors properly and recalibrate, often clearing the error if it was due to a minor glitch.
4. Inspect the Sensors Physically (if issue persists)
- The TPMS sensors are located inside each tire, and over time, they can become damaged, especially if you’ve recently changed or rotated your tires.
- If accessible, inspect the valve stems. If you notice corrosion or damage, a sensor replacement may be necessary.
5. Test and Replace the Faulty Sensor if Necessary
- A TPMS diagnostic tool can pinpoint exactly which sensor is causing the problem. Some auto parts stores or service centers offer this diagnostic.
- If one or more sensors are malfunctioning, you’ll need to replace them with Ford-compatible TPMS sensors to ensure proper operation.
6. Check Battery Life of TPMS Sensors
Since TPMS sensors have built-in batteries that last around 5-10 years, a “Tire Pressure Sensor Fault” warning could mean that the battery is drained in one or more sensors. Replacing the sensors should resolve the issue if the battery is indeed the cause.
When to Consult a Mechanic
If none of these steps clears the TPMS fault, there may be a deeper issue with the vehicle’s electrical system or the TPMS module itself, which would require professional diagnosis.
Let me know if you’d like any further details on any step! 😊