comports wrote:

iainvr4 wrote:

Here is the picture of it

Yours should look like the top pic. The bottom one is with the clip/spring removed.

Thats great new Ian - fingers crossed for you - I wish you were closer to me..!

I have no real clue what I'm looking at - I don't think the 'actuator' is the same thing that you were looking at although that part does seem quite hard to push (certainly not easy by hand) and, on a couple of occasions, did stick in the 'on' position and required me to pull it back.

This is the part i'm talking about - which I don't believe is the CSOV that you are looking at.

The rod (as shown with the arrow) is the part that will push with some pressure.. you can hear a 'glunk' when fully depressed which sounds like its closed a metal flap..?

Click image to enlarge

Had a further road test today and all ok up to 4K rpm and no issues. The valve from the faults codes which where the same as mine is the shut off valve bolted on to the back of the secondary turbo. The CSOV doesn’t have a position sensor so it wouldn’t know its position or if stuck but wonder if the MaF sensor faults is a sign of it sticking as it would cause a the passenger one to get a reading when it shouldn’t.

Click image to enlarge

That's certainly the turbine shut-off valve, not the CSOV. L405 D350 SE Carpathian Grey D5 19" rims

kevinp wrote:

Ok mate. Thanks.
Just read in the workshop manual that if the car is left idling, the secondary turbo will activate every 3 minutes for lubrication. So thanks for pointing it out.