Connectrob1991

Please help I've got a 2006 royal mail transit connect 1.8 tddi with no engine light coming on at start up ran cluster test it lights up an plugged it in to obd reader comes up p1000 can't finish cummunication to ecu basically on cluster scan came up uo with dtc d262 under the understanding its something to do with pcm an cluster other forums advised check connections please help

Did you ever fix your engine light issue I have it as well 2006 ex Royal mail