Ford Focus 1.8 TDDI Fault Codes P0404 and P1930: Symptoms and Diagnosis

Model: Focus TD Fault Code: P0404 Posted: 2012-10-03 09:01

I recently diagnosed a Ford Focus 1.8 TDDI with two persistent fault codes: P0404 (EGR System Malfunction) and P1930 (Fuel Additive Issue). The vehicle exhibits symptoms including rough idling, hesitation during acceleration, and elevated idle speed. I'm seeking input on possible causes and solutions for these issues. Any insights from owners or mechanics with similar experiences would be greatly appreciated. Thank you, Cosimo