I have had a 1999 Impreza L (2.2 engine) for four yrs and no problems except that the "At Oil Temp" light for the transmission comes every so often. I have changed the transmission fluid but the light still comes on. The owner's manual says to avoid hills and stop and go traffic when it comes on, but doesn't give any more information. Everything still works okay but I don't know if this is a real problem or just a bad sensor. Has anyone else had this problem? Thanks for any advice.