Having problems with this fault code found references to pump position signal and timing reference high resolution signal A malfunction. Seen different this that cause this code like egr, crankshaft sensor, pump and EDU.
EDU was done a year past in march at vauxhall using a brand new unit and the car runs well so i dont think its the pump. However i have been having problems with my EGR Valve and im changing it on saturday for a new unit to solve issues i've had with the fault code P0400. Now would the EGR cause a knock on effect to produce this code or is it the crankshaft sensor or some other thing that i have no found on other threads.
So clarification on this codes meaning and what may need sorted to rid me of it would be much appreciated.