dayion

Hi all, Looking for some help on this. Driving on the motorway and my 08 plate IS220d started to judder as if it was in too high gear, when the engine reached optimum temperature. It starts fine and runs fine until about 5 minutes after the temperature gage is in the middle. When it first did this no engine management light came on. However, the check VSC light has came on and I have had the code read which is P1238 - which looking on the web is a fuel pump or injector fault. Has anyone had this or similar problems. Could a blocked EGR valve cause this? Any help will be much appreciated.