Greg, pm sent. 2012 TDV8 Black Edition
2000 Disco. TD5
1975 series III

Thx Nino.
And Mike.

Recognise those pix Mike from a good post on CSOV: https://www.fullfatrr.com/forum/topic49556.html?highlight=csov
..which I've been studying ready to get my head in the engine bay tomorrow again, WD40 at the ready.

Some of your pix there too Nino

. Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

Greg, if you have vacuum pump /hand brake bleeder pump/ you can check if the valve is working ok. 2012 TDV8 Black Edition
2000 Disco. TD5
1975 series III

bit of a sore point Nino, Greg and vacuum pumps, but I would suggest, if it is old design with nut on top, just remove nut, or at least undo it to the top of the thread so that you can try levering it up a bit to work in plenty of WD 40.
Mike. G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.
https://www.fullfatrr.com/forum/topic56162...tty+affair

^^^^
the very thought did occur to me to.
Greg you can try and push lever in a bit to see if it moves. 2012 TDV8 Black Edition
2000 Disco. TD5
1975 series III

Ok front undertray off (geez a lot of bolts on that front one, only three for the middle one for oil changes)
Got a bolt on my CSOV, sprayed it - and tried to feel for lateral movement on the rod, I.e rod back and forth like a piston,
Is that correct?

. Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

that is correct Greg, it is stiff, that is normal.  2012 TDV8 Black Edition
2000 Disco. TD5
1975 series III

Just got home Greg, how did it go?
Mike G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.
https://www.fullfatrr.com/forum/topic56162...tty+affair

ok so been under again, Nino as you say it's very stiff.

But I can pull it a fair way and it snaps back.

Still investigating....

. Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

Just reading the manual, is it me or do they call that same valve different things:

Manual, Diagnostic Trouble Codes:
- Turbine Intake Solenoid Valve TSOV
- Boost air solenoid CSOV

Manual, Engine Turbocharger:
- Charge Air Inlet Valve

TSB
- Compressor Shut Off Valve CSOV

Is it all the same valve? I think so. Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

I have definitely misunderstood what the valve does.
I was always under the belief that it opened when the engine calls for the 2nd turbo, ie about 2500 RPM.
Failure to open gives restricted performance alarm then ??

If you believe it is moving correctly, then you can only clear the fault code and see if it reappears .
Mike. G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.
https://www.fullfatrr.com/forum/topic56162...tty+affair

It's a maze of plumbing alright:

Ok makes a bit more sense now that I'd been staring at it for bit....

Mike your original description is correct according to this:

The turbine shut-off valve on the secondary turbocharger is closed and therefore exhaust gasses are unable to operate the secondary turbocharger turbine. In this condition all turbo charging boost pressure is produced by the primary turbocharger using exhaust gasses from all 8 cylinders, giving exceptional response.

(blue text from workshop manual)

The Primary turbo blows straight into the intercooler. SO it's weird I am having problems at very low speed. Assuming the error code and workshop manual direction is correct.

Ok back to the code actions form the WM:

P1247-00 =

Turbocharger Boost Pressure Low - No sub type information =

Turbocharger actuator jammed =

a) If this DTC is logged with P00BC-00, suspect compressor recirculation valve (CRV) stuck open. If this DTC is logged with P00BE-00, suspect boost air solenoid (CSOV) stuck closed

b) Check Turbocharger actuator jammed. Check and install Turbocharger actuator. Refer to the Warranty Policy and Procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new module/component

No I don't have P1247-00 +P00BC-00 or P00BE-00
I just have P1247-00.

So must be Turbocharger actuator. Wondering which turbo. Probably primary, although it doesn't say.

Now I need to find find this Turbocharger actuator....

. Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

Last edited by GGDR on 14th Sep 2019 10:29pm. Edited 1 time in total

A quick search for the actuator:

Click image to enlarge