P0601 is the only code that it's throwing. The history is this: Almost a year ago this code popped up. When it did (or at least when I first noticed it), I also had a situation where my truck kicked out of overdrive, and wouldn't go back into it. I swapped the computer thinking that the P0601 code and the transmission problem were related. The transmission got progressively worse and had to be rebuilt. However, when that situation came about, my check engine light was already on for a faulty oxygen sensor, and that's why I didn't notice the other code...or never checked for it. I have no idea how long it had been throwing that P0601 code before the transmission went bad. Anyway, as of now I've fixed all the other issues. I was hoping this code would go away with them, but it continues to come back.