Well that's bad news for me, as my old valve appeared to still be working just fine. So if the cracked elbow was NOT the cause of my P0441 code, then there's a chance that I'll STILL be in trouble. . . Well, all back together and driving now to try to get the test to run so we'll see shortly!IMO, this does not set a code for the vent valve, otherwise we would have a "smoking gun" for the elbow as that is a much more common failure than the vent valve.