My 01 NB with 01m transmission seems to be in limp mode. The cel comes on and my generic obd reader gives me a p0700 code. The car seems to be in 3rd gear all the time. When I clear the code the car shifts normally. The code has come back. After searching this great site I am thinking one of my speed sensors is bad. I am assuming it is not the vehicle speed sensor since my speedometer is having no issues. Should I just go ahead and replace the other two sensors? Not sure how hard they are to get to. Any advice would be greatly appreciated.