So my wife's Optima SX has gone through about 3 weeks of rough shifting (hard shifts both up and down, staying in lower gear and high rpms etc). I read about the transmission temp sensor and how it could possibly be bad and causing this issue.
It finally threw a code after about 3 weeks of rough shifting: P0711. So I brought it in to the dealer today. I tried to get them to order the sensor prior to appointment stating that the "P0711" code CEL was lit, but they absolutely refused.
So diagnosis, mechanic thinks that sensor is OK but there is a pin on the harness that is bad. So they are ordering a new harness/connector. I'm kind of skeptical on the "bad pin" theory...
Has anyone had this issue resolved with their rough shift transmission issue?