My TS408 seems to consistently read 4-5 psi low.  I've tried on two different vehicles (Subaru), and compared readings with 4 different gauges, 3 stick-type and 1 dialed gauge.  The analog gauges will typically show 30 psi, and the TS408 will read ~26 psi.  I don't know if all my gauges are equally wrong, or if there's a calibration issue.  All software is up to date.  Any thoughts?  

Tags: TS408