Was wondering if someone has had this issue, search the treads, but could not find it. Yesterday, I was driving and my check engine light came on and my tow haul light was flashing. When I tried to push my tow haul button on the shifter, nothing happened and it kept blinking, however is does go back and forth into tow/drive mode. My programer did not pick up any new codes. The truck drove the same and I did not notice anything different, except the annoying flashing light/s on my dash. My transmission read on my edge showed and negative temperature reading (very strange). If I shut off the truck and turn it back on...it goes off, but several miles later, it does it again (lights come on and temp is messed up). If I put it in park everything goes to normal.
I'm pretty sure it is my transmission sending unit sensor. I have no idea where it is located to check on it. How hard is it to replace? Really don't want to go to the dealer since I just spent a fortune on my boat's service and would rather do it myself if I could.
Any suggestions would be beneficial since I am 5 hours from my house with my truck and need to drive home. Don't want stall in the middle of the desert.