Originally Posted by ahmed255
I noticed in Star Scan that there two thresholds for the Tire pressure gage sensor system, the first at 20 psi and the second was at (I think) 7 psi.
The alarm goes off at 20 psi, what happens when it reaches 7 psi (the lower threshold?
If we're talking WK/WH, the placard value for front and rear tires is 33 psi. The low tire pressure will alarm at 26 psi, which is a differenance of 7 psi. For XK/XH placard is 35 psi and low tire pressure at 28 psi, also a differance of 7 psi. Not sure if this is what you are seeing in the starscan, but this is the basics of the TPM system.