This DTC tests the evaporative emission (EVAP) system for a restricted or blocked EVAP vent path. The control module commands the EVAP canister purge solenoid Open and the EVAP canister vent solenoid Closed. This allows vacuum to be applied to the EVAP system.
Many people make the claim that Man has a tailbone left over from evolution. This page will examine these claims and show that mans tailbone is nothing of the sort... and rather than being a left over from evolution, the tailbone has a distinct role and purpose. The following is an excert from:
The science of human tails. Some hold with the theory that the development of an embryo shows the stages of evolution. In other words, what first develops is fishlike, and then like a small mammal, and then like a lemur or ape, and then something we would recognize as human. Very early embryos have what look like little gill slits in the beginning of their development. At about four weeks, embryos have a little tail.