Jaguar Repair Problems? Ask a Jaguar Repairs Expert.
Sounds like we may have injectors leaking. This will cause your issue. The injectors will most likely need to be replaced. I have also run into a couple of oxygen sensor issues but usually those codes point to leaking injectors.
Ok do you have the code number for the High speed regulator 1 exceeded learning limits too high fault?
Another possibility is an issue with the high pressure fuel pump timing. A special tool is used to check the timing. The vacuum pump is removed and with the crank at a certain spot the tool fits into th fuel pump cam.