I was backing out of my drive way and when I put the car in first it died and my engine light came on. I couldn't get the car to start for a minute or so and couldn't get it out of first to roll it out of the road. Does anybody know what the error codes P1646 and P1647 mean. I know it has something to do with the SMT electronics,but don't know what to do to fix it. Also is there a way to get the car into nuetral if it happens again. Any help would be awesome. Thanks.