MK7 ENGINE MALFUNCTION LIGHT. HELP!

[Drive4it]

Hi all.
(Posted on incorrect board previously, hopefully some others may see this )

I've got a transit Tourneo minibus 59 plate.
After having an issue I had both pressure sensor and relief valve fitted fitted by a diesel specialist..
But for some reason a fault of p0089 rail pressure won't go away and on starting the engine it shows engine Malfunction light.
Can clear it but soon as starting engine it comes on again.
All perimeters in regards to fuel pressure and voltage etc are reading correct. Rail pressure nominal 23.6MPA and rail pressure sensor voltage 1.36v
Because of the new MOT regulations it won't pass on the light coming up. Very frustrating

Any help would be muchly appreciated
Drive4it

[Airthies]

Have the pump and injector learns been done?
Was it a genuine/oem scv & prv that were osed? As some spurious ones don't work.

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