We've had an issue with the Rav for nearly a year now, and it happened the day after we'd taken it into the Dealer to have its annual check-up -- you know, one of those 'milestone' check-ups when the car has turned over a certain number of miles and they decide it's time for you to come in and lay some money on the altar so they can keep selling overpriced cars. I was coming back from someplace -- I think it was the hardware store -- and just as I turned into the driveway, the 'Check Engine' light came on, and the 4WD light, and a couple other lights. Made me mad. We'd just got it back from the shop. I was so mad, there was no way I was going to take it back there. I'd fix it myself. Naturally, absolutely nothing was fixed over the next year or so. The car drove fine (other than no cruise control). I occasionally looked into it, trying to track down the cause of the P12701 fault (02 Sensor Fault, Bank 2, Sensor 1). Odd thing was, the brakes started s...