I just got my 4 runner, it doesn't want to work in reverse. I can hear it shift in reverse but it has little or absolutely no power. The check engine light is on. It's also 4wd, but have been hesitant to test it out. Can hear the transmissison shift n2 4wd, but no light comes on. It also seems to have a loss of power problem. I had to junk my last car after lots of work, please help can't afford new transmission!