i got the LOW TIRE PRESSURE message last week, turns out i had a screw in my right rear tire and it was leaking air slowly. BTW, don't wait for the warning message, my deflating tire was down to 20 psi when i got the warning from the TPMS. Not knowing what was wrong, i inflated the tire and checked it again a few days later.... down to 24 psi and no warning.
So my guess is that the TPMS warns the driver at around 20psi, wich is way too low already. Tire pressure must be checked regularly for safety
Wow this is an interesting coincidence. Last week I also got my low tire pressure message and I also had a screw in my right rear tire. When the sensor went off the tire was also at 20 psi. I guess that's the threshold level? After re-inflation I had mine go down to 23 psi a few days later and also no warning. The problematic aspect of this is that at 20 psi the tire does not appear to be deflated visually.
2018 GT350 - Race red
2012 Mustang GT/CS - Race red - Electronics package - Security package - 3.73 - Steeda shift knob - Steeda shift bracket - ProCal II Tune - GT500 ABs - Shaftmasters DS - Boss 302S Wheels - Build date: February 14th, 2012
2011 Mustang V6 - Pony Package Premium Coupe - Black - Charcoal Leather - Roush Front Fascia - Matte Black Lemans and Hockey Stick Hood Stripes - 6% HP Charcoal Tint - 3.31