I agree with Mike. I just got mine back yesterday for the same no start but okay all day until overnight stay. Code for Water Temperature Sensor (WTS) is 21. Part is $25. Dealer labor for diagnosis and install was $212. I get a 10% discount on parts and labor but the price is ridiculous. Other members report easy change over of 10 minutes. You can see thread on hard starting in this TQA section for other comments.