The engine management light came up to read Turbo overboost. Had a look and found first of all a plug off near the intake manifold (been off a while, by the look of it.) well closer to the front, difficult to describe , but can take a pic.
Also a pipe looking for a home which came from under the intake manifold . This should have been attached to a vacuum control sensor which has another pipe attached to the end of the cylinder head . This sensor was too expensive to replace so managed to secure the broken hose tail with epoxy . The sensor had a price tag of £200 !

Anyway The car has been running for a couple of years fine with no problems so I dont know how long the parts were broken or disconnected.
The upshot is the car is is quite jittery now and I wander weather some sort of reset either to the throttle or disconnecting battery might help, so it relearns.
Any help appreciated.

Can anyone explain where or what is the Diesal airflow position sensor , this fault maybe the answer to my rough running, it ont clear in car

First Post sounds like a bit of a "what the hell...". I think you'll need some photos of you wanted some input on that so the experts can give you some thoughts.

As for code, i'd clean /replace your MAF sensor to start

Ok I am able to confusion in my story line . So the MAF was cleaned 3wks ago and didn’t change situation. In fact it has probably worsened when I repaired the sensor hose tail and a plug was replaced I suspect this asI said has been broken and removed sometime ago. Not by me I may add . I’ll add a couple of photos if I can .




So the rubber pipe was repaired as the pipe tail was broken now fixed, so that is as it should be.
The other picture shows a plug that became attached at some time and hasnt shown as a fault ever., its now back on and now awaiting for new MAF.

Looking at a few videos , that plug should have been into the throttle body . How the hell this car ran , I don't know.

MAF now fitted , better response on kick down, but hard to handle in traffic , throttle response anc auto misbehaving. Perhaps this is the throttle body , unfortunately the mot is booked tomorrow, however this may not affect the test as long as emissions are ok.

Ok looks like this is my problem !

Is that how you found it or have you stripped it down? You can buy a repair kit for around £30 or so and a new throttle body from £80 upwards . If renewing the throttle body I would go for a Pierburg one which costs around £115 to be assured of a decent quality item. Good luck!

Have secured a Throttle body from Lrpatts. £70 something plus vat . Thank you

Wasn’t aware there was any kits by the way.as you can see it’s stripped down .

Glad you have finally got to the bottom of the problem!

I don’t think I answered your querie properly. The picture is my throttle body stripped down once I dismantled and removed the cover , and that is and was how I found it. I am kicking myself that I could have got the gear kit to replace it, however I was under a bit of pressure on Thursday, as Ihad to test my Rr instead of the booked in Freelander and the Range Rover also let me down , so didn’t read your texts in time , doesn’t make much difference now as nothing is going to happen till Mon,

I just wondered what position you found the throttle butterfly in and how freely it moved when you stripped down the throttle body. The teeth get stripped when the butterfly gets jammed by carbon buildup. Note that the main reason for the throttle is to ensure complete shutdown of the engine. A Diesel engine doesn’t need a throttle to control fuel/air mixture like a petrol engine.

Well I didn’t know that , I was of the assumption it worked like petrols , always learning!
The butterfly was fully open.

Well I didn’t know that , I was of the assumption it worked like petrols , always learning!
The butterfly was fully open.
Incidentally there must have been a previous problem prior to me buying the vehicle as the plug was off the throttle body, to drive the butterfly 3yrs ago! Also that small pipe broken off the bottom of the solenoid shown in pics.

Throttle body now changed but still erratic surging , black smoke , so too much air? , could be a hose somewhere split , any help appreciated as to where the usual pipes might be that go . Turbo hose or intake hose . There is a mess of oil been for a long time 2 yrs maybe? At the bottom of the radiator and I assume the transmission matrix.