I have a Subaru Legacy GT twin turbo 1994 Auto Grey import,

I have just had the auto gearbox changed with a second hand one supplied but not fitted from NIppon Spares (i will never use them again)they will not exchange the gearbox even though it has a three month warranty.
The second hand gearbox has a problem in that the Power light on the dash board flashes 16 times when you start up the car and then goes out, i have got the system tested and there are three error codes coming up
33 VSP
21 ATFT
24 4WD

Does any body out there know what these error codes are?
The car seems to change up and down through the gearbox when you try and keep it at a constant speed.

 

John,

Try posting on the "WRX-Auto" mailing list:

 

looks like
1, vehicle speed sensor
2, 4 wheel drive sensor
3, could be auto fluid temp sensor.