I've found TPMS to be around 2psi out.
You last checked your pressures ~6 months ago........ I doubt mine lose 3psi in 6 months TBH.
For anyone considering a good tyre pressure guage for reasonable money: https://goo.gl/vrmZhs
You last checked your pressures ~6 months ago........ I doubt mine lose 3psi in 6 months TBH.
For anyone considering a good tyre pressure guage for reasonable money: https://goo.gl/vrmZhs