My son is in college and was recently home for Christmas. I changed the oil in his 2017 2.0L Escape like I always do. This time, however, I saw that the coolant was below the low line. That has never been the case. It has 53K miles on it, so my first instinct is to have him take it to a dealer ASAP in case it is something major since it is still under the powertrain warranty (and since he is currently on Christmas break). Does this seem like the appropriate course of action? Does anyone know if Ford will charge a diagnostic fee if they don't find anything wrong? I'm not in a hurry to spend money for nothing, but it seems like it is something that we should get checked out. I've done some googling and see that there are issues with some of these engines where the coolant is leaking into one of the cylinders. So far, his engine is running fine and there are no check engine lights so I'm hopeful this coolant leak is something more minor. Has anyone else out there with this engine experienced a slow coolant leak that turned out to be a relatively minor issue? This is more just to satisfy my curiosity. I guess I'm just curious who out there has had coolant slowly disappear in their Escape and what the issue turned out to be. Thanks in advance!