ProTech Auto Systems is your trustworthy supplier of all ECM, PCM, and ECU YNAU; YNMT; YNNX; YPAS; YPHS; YPKA; YPKJ; YPLA; YPML; YPRX Auto Computers. These devices monitor the fuel, air, and electrical aspects of a YNAU; YNMT; YNNX; YPAS; YPHS; YPKA; YPKJ; YPLA; YPML; YPRX engine to ensure optimal engine performance. When an auto computer becomes impaired, that is where ProTech Auto Systems steps in.