Hi, does anyone know of any common problems that cause this fault code to come up on a focus? it's a 2000 reg 2.0 petrol. The main problem is the car cuts out now and again with no warning whatsoever. It seems to drive lovely until it cuts out. Any advice would be great thanks. Fault code is p0170 and is classed as a fuel trim malfunction (bank 1).. that is all i know thanks