Hello - I'm new here.. wondering if someone could point me in the right direction... we have a 2009 base model 4WD Rav4 that up until recently had been problem free. Right now it has a P0717 code - is there just one sensor that could be the culprit? if so, where can I find that thing? Also after reading through some threads here I've seen mentioned downloading the wiring diagram for testing purposes, but I can't seem to find it, could someone point me in the direction of that as well? Thanks in advance!