first welcome to the forum.. using the search feature at the top of the page will answer 75% of your questions you may have, this website has been really active for the 3 years ive owned my vx and im sure long before that, so almost every topic has been covered
as for your abs light, im not sure what code 12 is, but you can download the tech manual for the VX in the downloads section to the left of the homepage here. a lot of us have had abs issues though, its occasionally a speed sensor or loose wire, but the abs modules in the engine are notorious for crapping out on these vehicles.. but to buy a new one from a dealership will run you 2,500!! there are a few VXs being parted out around the country, if one of them still has the abs module in it, you should probably be able to get it for 100-200, and replacing it yourself is not a huge deal either, it took me maybe 2 hours by myself (1.5 hours of that was trying to bleed the brakes on my own), and if i did it again i feel like i could knock it out in about 45 minutes w/ a helper
heres a link to the instructions about how to replace your abs module
http://www.vehicross.info/modules.ph...warticle&id=31
and a link to the service manual for the vx
http://www.vehicross.info/modules.ph...warticle&id=20