pacodiablo
Well-Known Member
- Joined
- Aug 6, 2007
- Messages
- 392
- Age
- 37
- City
- Birmingham, AL
- Vehicle Year
- 2002
1994
- Transmission
- Automatic
My OD off light began flashing today in my 95 Explorer. The only code it spat out was 639, which is a fault in the transmission speed sensor circuit. I did drive the truck on a muddy wet trail earlier...is it possible that messed up the sensor? Is it okay to drive the truck? What/where is this sensor and what kind of money damage am I looking at? The truck shifts fine and the fluid is good.