Ford Focus TD CI 1.8L Fault Codes U01, U73, U121, U131, U140, U155 - What Do They Mean and Is It a Major Issue?

Model: Ford Focus Fault Code: P0011 Posted: 2016-02-25 12:54

I'm looking for help with my Ford Focus TD CI 1.8L vehicle. I've recently picked up several fault codes: U01, U73, U121, U131, U140, and U155. Can anyone explain what these codes mean? Are they indicative of a major issue or something that can be resolved with relatively low cost repairs? Any insights or advice would be greatly appreciated.