Subaru Problems? Ask a Mechanic for Answers ASAP
Hello, my name is Bobby. Thank you for the question. If the light is on all of the time then you more than likely need a new transmission fluid temperature sensor. I have also seen wiring issues with the transmission harness but it is almost always the sensor. It is located inside of the transmission. I hope this helps. Let me know if you need further assistance.
It is typically about $500-600 to have it replaced.