The BVSV is there so there's no EGR until the engine warms up. (any vacuum that would otherwise go to the EGR valve is lost)

Failing in the below 30C mode would mean the EGR won't function.

Failing in the above 44C mode only means the engine will run slightly rougher when cold.


Since a smog test is run when you're engine is warmed up,  hope that if it fails, it's in the above 44C mode (like mine did years and years and years ago).