I just mounted a set of Mountune/OZ Racing Alleggerita HLT rims with the OEM Bridgestone Potenza RE050A tires in 205/40/17 size on my 2014 Fiesta ST. The tires and wheels had TPMS sensors installed from Tire Rack. I also purchased a Ford Trigger TPMS tool from Tire Rack and followed the following procedure for calibrating the TPMS sensors: If your vehicle has push-button ignition: "1. Make sure all tires are inflated to the vehicle specifications. 2. Make sure ignition button is OFF then press and release the brake pedal. 3. Hold the ignition button down for 2 seconds, release it, and then tap the button once. The vehicle should be OFF. Hold the ignition button down for another two seconds, release it, and then tap the button once. 4. Hold the ignition button down for two seconds again. The vehicle should be in RUN mode, engine off. 5. Press and release the brake pedal. 6. Tap the ignition button once so the vehicle is OFF. 7. Hold the ignition button down for 2 seconds, release it, and then tap the button once. The vehicle should be OFF. Hold the ignition button down for another two seconds, release it, and then tap the button once. 8. Hold the ignition button down for two seconds again. The vehicle should be in RUN mode, engine off. 9. The horn should sound letting you know the vehicle has entered into TPMS relearn mode. 10. Place the top of the FORDTRIGGER on the sidewall of the driver's side front tire in the location of the valve stem. 11. Press the button of the FORDTRIGGER tool. The vehicle's horn will sound letting you know the sensor has been learned. 12. Once the horn sounds, move on to the passenger side front tire and repeat the process. Each tire should only take 30 seconds or less. 13. After the passenger side front tire has been learned, continue on to the passenger side rear tire and finishing with the driver's side rear tire. 14. You may now turn the ignition to OFF. If the horn does not sound, the sensors were learned successfully. If the horn sound twice, then the process must be repeated because there was a malfunction." I am able to get stage 9 in the above procedure so that the central nav display in the car says something like "Calibrate or Learn left front TPMS sensor. I quickly hop out of the car and hold the TPMS triggering tool with the arrow pointing toward the sidewall of the tire near the valve stem. I hold the green button down and a little red light comes on for a few seconds then disappears. However, the car never honks once to indicate that the TPMS sensor has been learned by the system. I try holding the button down multiple times with no luck until the car honks twice to indicate that the procediure was unsuccessful. Any ideas on how to resolve this short of taking it in to the dealer? As background info, I have removed the OEM rims and winter tires with their TPMS sensor far away from the car and tried driving the car for over 20 minutes. Interestingly, I have yet to see a TPMS warning light go off in the dash display even with the new rims and tires. Thanks for any advice you can give me.