One sensor not reading accurately - off by 2psi - other sensor matches gauge perfectly

I've had the FOBO 2 on my motorcycle for a little over a year. My front sensor matches my tire gauge exactly. My rear sensor reads 2 psi lower than my tire gauge. Using the same gauge. Is there a way to manually adjust the FOBO sensor from its reading? If not, is there a replacement policy after 1-year, or am I going to have to tweak my alarms and adjust everything down by two psi?