I received a letter about the PCM software upgrade on Jan 18th 2020 to help fix the coolant leaking into some cylinders. My 2017 Escape is on it's second engine due to this leakage after ~4200 miles. The mileage is now just under 5000 miles. It's our third car and only does ~2000 miles per year. I called the dealer and he told me to bring it in on my next oil change for the software upgrade, if it even needs it, because the new engine was installed Dec 16 2019. Hopefully I got the latest software with the new engine. Anybody know if the PCM upgrade changes the power curve or the torque curve? Are we still getting the HP and Torque we were promised in the specifications when we purchased the cars? I had coolant leaking into cylinders 2 and 4. Apparently this is a known fault with the engine cylinder liners cracking between cylinders and allowing coolant to weep into the cylinders. My local dealer has replace around 100 of these engines. The liners had a design fault which allowed cracks to develop due to expansion and contraction of the steel liner relative to the aluminum block. The new engine has a revised liner design that is supposed to prevent cracks occurring. I have seen, in person, the two designs of liner and hopefully the new design is better. The new design is stronger but may be less compliant to the demands of expansion and contraction of the liner relative to the block. Time will tell.