AT oil temp flashes

what could be wrong that its flashing at me once i start the car? it flashes for a couple seconds then goes out. I read in the manual it says to "have car serviced immediately"
or could it just be as simple as the car telling me that my speedo doesn't work?

 

It's the same as a check engine light, but for your tranny.

 

but let me guess my code reader, won't read the codes.

 

Not unless it's a really good one that reads tranny codes.

 

but would a bad speed sensor cause this? or from some digging around they claim some solenoids go bad could that be my problem? or something simple like low fluid?

 

Is the car OBD 1 or 2?

 

snap, its a 95 awd impreza, and its OBD 2