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Seems like Bank 1 and/or Bank 1 wiring is not happy. I’ve never seen a code for a coil ‘fuse’ but perhaps that is Foxwell speak? If nothing was recently done to engine (esp on Bank 1)…wonder if something melted or pinched?
The description is correct when looking up those codes in the MB manual.
I dont know what year or engine this is.
Unfortunately i'm not finding any reasons for those codes. Short to positive or open circuit could be the component or the wiring to it. Example I had a fog light out and the fault code said short circuit to positive or open circuit. It turned out to be the ground wire, I spliced in a new ground wire to fix it.
I am seeing something about checking fuse N10/1f21 when I look up those codes in my W204 manual. Very odd since in my car and W212 fuse 21 is showing as for the brake light. Might as well check it.
I'm thinking look thru the wiring diagrams and see what these have in common.
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