Question Answered: My shifter is stuck in park transmission shop said tranny is fine need answers
October 16, 2013, 05:45 AM
Turn your key 1 click, Before run position, do not turn ignition on. See if shifter will move. The brake switch has to work in order to release normally. If you can get it into neutral you can start the truck and tank it to someone to test it, unless you know how to test the brake light circuit.
Question Answered: what is po641 error code for above vehicle?
October 14, 2013, 06:52 PM
It means you have a 5v reference circuit problem from the PCM. Ref cir #1 feeds the fuel tanK pressure sensor and the EGR. #2 feeds the MAP sensor and the a/c refrigerant pressure sensor. They send a 5v sig to each and the return voltage tells the computer how it is working or not working. See a tech to trace the circuit and repair it.