It is a 4-cylinder turbo engine that remains among the strongest among all the engines that fall under the EcoBoost family. Ford based the 2.3 EcoBoost engine on its 2.0 second-generation counterpart. The two have several things in common, including the height of the deck and the size of the bore.
The 1.5 EcoBoost is a pretty reliable engine and does not cause a lot of trouble. To date, significant or common problems in the mechanical part are not reported by consumers. The engine doesn't have any problem with the cooling system and it is not prone to overheating like the 1.6 EcoBoost.