Discovery 4 - Limp Mode Cold Start Manifold absolute pressure issues

Hi folks,

I got a discovery 4 2010, its been great but recently its been going into limp mode on cold starts, if I put it under stress within the first 10 mins or so of driving, I get a big puff of smoke out of the exhaust at the back and the car loses oil slowly over time so I plugged in my code reader and got the following codes (see images), first is P006A-00 "Manifold absolute pressure - mass or volume air flow correlation", the second is P1247-00 "Intermittent Turbocharger boost pressure low".

There are no oil leaks that I can see, no oil under the car so I thought it might be a manifold leak, I bought a smoke machine, plugged it into the hose (see pics), I have no idea if this was the correct hose to plug in into but it created a lot of back pressure I had to push the thing in to keep it in and could not see any smoke leaking anywhere with a torch, not in the engine bay, not under the car, nowhere.

I cleaned both the MAF and MAP sensors well, and during I noticed oil in one of the tubes leading to the turbo sensors, see pictures.

I am not a mechanic, only just got into doing stuff with the car so any ideas would be greatly appreciated.

Thanks in advance for the help guys and all the best, Mantrid.

Hi, that's what the LR workshop manual states for those codes so you'll have to insist on that

Testing at that position means you're only testing a third of the air intake & charge air system at best, better to test at the two ducts coming from the air filter enclosure (the one where you identified oil) Of course, you'll have to blank off one of the ducts. As well as smoke, check the charge air hoses for any localised swelling whilst under pressure, this can indicate delamination of the hose due to an internal tear - I've know this lead to an air 'bubble' within the hose structure which causes a restriction.