Quote Originally Posted by cv2065 View Post
Maybe this will help diagnose:

https://www.engine-codes.com/p0365.html
https://www.engine-codes.com/p0369.html
yeah I had googled the codes and see lots of options for what it could be. On some of the Mustang forums they suggest driving it for a bit and the ECU can "relearn" the timing. If that doesn't work, the low-hanging fruit option would be to replace the sensor, although they are located on the back of the heads, and I'm not sure if there is physically enough space to remove them without lifting the engine which would be a MAJOR pain. I'm hoping these codes go away on their own or somebody has been through this before and can offer some advice.