Working on my stepfather's 98 Legacy Outback and it's throwing a Trans Code 23 which is "Engine Speed Signal - Detects open or shorted input signal circuit" The car seems to drive normally and everything else seems to be functioning. No CEL, no hard shifting other than the first shift when cold. No obvious tourque bind. What should I be looking at or for? Stepfather smokes like a chimney in the car so it's full of ash, don't know if that matters since I believe the TCU is in front of your left knee under the dash?

 

Suggestions?

 

Keith

I would want to know if the tach is irratic sometimes and then I would head for a FSM after that. Not much help I know.

Reset the TCU and see if it comes back. Probably just farted and the code might not come back. If it does you probably have a problem...