I am new to forum.
I have same problem P0723 OSS - intermittent state error. i was driving 120 kmph cruise control suddenly car started losing speed. speedometer needle went to 0 kmph and then started jumping to different speeds while car was losing speed, jerky transmission and it didnt accelerate upon pushing the gas. Engine light came ON so i stopped the car.
Restarted and it wont move even 2000 rpm, D started flashing.
I took the car to automatic gear specialist, my car is out of warranty and it has 110k km and i am the second owner.
Dealer changed the OUTPUT SPEED SENSOR with new one, after 1000km driving ENGINE LIGHT came ON again, went to same garage and diagnosed same error P0723. Done Complete transmission overhaul, didnt change TCM.
I took my car yesterday from garage and felt transmission shiffting is smoother as compared to before but same day driving only 90km ENGINE LIGHT came ON again and abnormal gear shifting behaviour, crazy speedometer and increased rpm, in night i parked the car with ENGINE LIGHT ON.
Next morning, today, NO engine light and car is running normal. Went to same garage, he scanned and found same P0723 error code in the memory.
He is now asking to change TCM !!
I am not sure what to do please advise.
One more thing even with the engine light ON when i drive car when its cold it runs smoothly, as it gets hotter problem starts appearing - does this all problem have anything to do with the temperature ?
Now a days in UAE its 45 degree C.
I have spent so far 1500 USD