I have had this issue also. Once while driving on the expressway, once just starting the car, and once while driving on side roads for only 2 blocks. Each time there wasn't a code. After the first one, the shop replaced the TCM. 4 weeks later the check engine light came on and they resurfaced the cylinder heads. As I started the car in the parking lot after the cylinder heads were resurfaced, the please stop safely error popped up. Since I was in the parking lot, they scanned it right away and there still wasn't a code. The shop fully erased all readings and codes in the system and they thought that was the issue. 2 weeks later the please stop safely came on again after driving 2 blocks. Each time the please stop safely came on, there wasn't a code. They did troubleshooting and saw the wrong voltage was going to the transmission after the first time, that's why they replaced the TCM. The shop is currently driving the car themselves and trying to find out the issue without any luck. I've had the coolant and transmission flushed on a regular basis and those system are working great.
Anyone have any idea why this keeps happening?
I have a 2013 C-Max Energi SEL 153,000 miles
