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.


Last edited by kevinp on 29th Apr 2025 12:35pm. Edited 1 time in total

Faults would be stored if the valve isn't where it is supposed to be as its position is monitored, including at idle. L405 D350 SE Carpathian Grey D5 19" rims

Yes Graeme thanks. No codes so I presume it is working correctly.

comports wrote:

Hi Gang,

I think I'm getting somewhere now, although strange it still seems a little intermittent..

Have only fallen in to Restricted Performace a few times lately, seems to pull like a freight train for most round town driving but play silly when already doing 30+ mph and decide to accelerate... No idea why.

Today, with IID plugged in, i tempted her into Restricted again and, without turning the engine off (which seems to clear the fault), I managed to pull the following...




This now seems to suggest a mechanical failure of the Actuator being stuck.

I pressume this is now not the secondary turbo shut off valve itself .. I think it is the thing that does the shutting/opening of that valve.?

Is it a case of 'lubing up' to free it off and see how it goes, or is it better to just replace it?

Finally - Do you think this is a Driveway DIY'er job or better to book in somewhere?

Many thanks all as always.

Hi Ian,

Not quite sir but I think there were a number of issues (possibly related) on mine.

The oil loss was a big one as I lost 9+ litres in a couple of months.

If you take out the oil filter you will likely not see much in the bottom there - I suspect it will have a fair amount of oil in the base. Use old rags or paper towel to soak up as much as you can. Although its called a spring, its more like a spring loaded clip (KevinP's pic is the best view https://www.fullfatrr.com/forum/topic70038-45.html) and should have a rubber bung located on one side of it.

If you are losing that much oil I will bet the rubber bung is missing or dislodged, no longer covering the drain back hole. Its a very simple fix but you'll need to find someone with a spare spring/clip.

My oil issue was completely solved by replacing mine and not used a drop since but I still need to get underneath and take the under tray off to check the actuator movement and possibly the wiring - I suspect with all the oil around the area, things might just be rather gunked up but I do still go into restricted performance but only if I 'hoof it'. Ash
------------------------------------------------------
2022 SDV8 AB
2016 TDV8 VSE
2011 TDV8 VSE
2006 V8 Vogue
2002 2.5 Vogue

Hi Ash,

I’ll have another look at that, when I looked at mine before it didn’t have the plate at all so took it as a change in design. But after reading loads of posts I looked at the part numbers and they haven’t changed. The car got the oil cooler gaskets done at Christmas so wondering if something has happened then. I have the same turbo faults as well with it going to restricted performance which I think I am narrowing down to the sensor sticking on the shut off valve on the 2nd turbo. The valve is moving ok but when you drop the vacuum off it the sensor is still showing it as open. I took the 2 turbos off and got them tested and came back all ok. Just a total pain. Thanks

Oooh - wait 1... Your profile shows a 2004 TDV8..? If thats true, the set up might be completely different.

Do you have an inverse fitted oil fiter, i.e downward facing ..? That spring and hole in the oil cooler housing is to allow drain back of oil from the filter when removing, presumably for a filter change.

Did you remove the engine to retrieve the turbo's I don't believe thats possible/easy on the L405s.

I want to check my actuator but have no idea where to start - will jack up and axle stand the front, remove the front under tray and go for there I guess. Ash
------------------------------------------------------
2022 SDV8 AB
2016 TDV8 VSE
2011 TDV8 VSE
2006 V8 Vogue
2002 2.5 Vogue

Thank you Ian for giving me the nudge to go take a look at mi e to see if I can get closer to the issue.

So, after jacking it up, axle stands in place and wheels off for better access, I removed the metal undertray. At first I struggled to find what I was looking for so made myself a brew and scratched my head. A quick ready through this thread and NorthernMonkeyJones’ post on page 3 set me straight.

Thanks quickly found said secondary turbo actuator from underneath - and it’s quite obvious when you spot it.

I couldn’t move it by hand (it’s a little difficult to reach anyway) but then, using an extension bar, I managed to reach the arm/ball and it did move, a little stiff at first but after a liberal dose of WD it was better - however, I did notice a few times it did not return to ‘normal’ (closed) position and required a jiggle to free it off….

I went for a quick spin and she went up through the rev range to past 3,500 and changed up and up again but when I backed off she tripped into restricted. 😩😡

Given the last error code I got was ‘Turbo actuator valve stuck high’, have I hit the nail on the head here..?

If so, is this indeed a repair kit job or just a straight replacement. ??

Thanks all for sticking with me..! Ash
------------------------------------------------------
2022 SDV8 AB
2016 TDV8 VSE
2011 TDV8 VSE
2006 V8 Vogue
2002 2.5 Vogue

comports wrote:

Oooh - wait 1... Your profile shows a 2004 TDV8..? If thats true, the set up might be completely different.

Do you have an inverse fitted oil fiter, i.e downward facing ..? That spring and hole in the oil cooler housing is to allow drain back of oil from the filter when removing, presumably for a filter change.

Did you remove the engine to retrieve the turbo's I don't believe thats possible/easy on the L405s.

I want to check my actuator but have no idea where to start - will jack up and axle stand the front, remove the front under tray and go for there I guess.

kevinp wrote:

Have a look at these pictures.
First shows valve correctly fitted.

Click image to enlarge

This is with the valve missing.

Click image to enlarge

Looks like yours is fitted. Just check the rubber bung is in place and not missing.

Here is the picture of it

Apologies Ian. Was going off your profile.

Just a thought Ian,

I won’t drive it for long like this but if I unplug the MAF sensor on the right hand air intake mine doesn’t trip into restricted. You could try that in conjunction with your live data to see if it make any difference or you get a different reading?

Cheers Ash
------------------------------------------------------
2022 SDV8 AB
2016 TDV8 VSE
2011 TDV8 VSE
2006 V8 Vogue
2002 2.5 Vogue

iainvr4 wrote:

Here is the picture of it

Just now mine looks like the bottom one 🤦🏼‍♂️

Click image to enlarge

The concerning thing is where the hell has it gone and when???