I am new to the forum but have read the articles with great interest. I have a 97 Auto Disco showing the same problem. My LR garage in France had and still does not have a solution. The readout of the diagnostic program points at the throttle potentiometer, cooling water temperature and bad wiring. I checked the wiring and see no obvious problem. I have also noticed that the problem seems to be temperature ‘independent’ and did not change the temperature sensor. The obvious one to me seemed the throttle potentiometer and thus changed it. The Bosch part, although still very expensive, was half the price of the LR part. This as more of you have already discovered, did NOT solve the problem. I am now investigating all the various sensors connected to the EDC, Mass Air Flow (MAF), Manifold Absolute Pressure (MAP), Exhaust Gas Recirculation (EGR) etc.
Have any of you more news on the problem?