sana may mka sagot sa tanung mo bro.. like i said di ko rin sigurado kung pcv valve-- most likely hinde.. unless meron kumakalog sa loob eh at least alam mo valve yan.. dahil meron sya spring-- it must be some sort of a pressure sensing device.. kung temperature sensing device eh usually di ganyan kalaki.. best talaga mga taga toyota ma tanung mo.. at least meron sila parts catalog.. baka naman di part ng car mo yan kung wala ka naman nakikitang unusual na disconnected..