I have seen a lot about this but no answers really. My avenger is stuck in limp mode. Or won't shift out of first. It runs fine when it is cool and shifts. But after it heats up it will not shift if I slow below 20 or stop. I have two codes. P0700 and P0755. I replaced the speed inputband output. I also replaced the shift control sensor (entire thing). Never had transmission fluid replaced and no filter either. It has 160k miles on it. I'm going to drop the pan tomorrow and change fluid and filter. If this doesn't fix it what else can I do?