W212 OM642 with high diesel pressure code 11C300




CEL shows "high fuel pressure implausible" which means it is off the charts.
Looking for help to track down the culprit. I can throw a fuel pressure sensor at it, or a pressure relief valve, or a new fuel filter, or ???
Anyone have this issue that can point me at first things first?
CEL shows "high fuel pressure implausible" which means it is off the charts.
Looking for help to track down the culprit. I can throw a fuel pressure sensor at it, or a pressure relief valve, or a new fuel filter, or ???
Anyone have this issue that can point me at first things first?


