Yet another little problem occurs after fixing another, I was getting the restricted performance message and it was due to a split pipe from the doughnut to the intake all four now replaced now I’m getting out of no where restricted performance if I try to floor it (never had this issue before) I’ve looked and the changeover valve is the later one I’ve sprayed with wd40 and can move it slightly, can I have dislodged any important wires etc when I removed the doughnut, I took the sensor out from the doughnut it was completely full of gunk so I hovered it out up until is there a way of checking it via the iid tool or are there any fuses I should be looking at, access is very restricted especially with large hands arms etc, how much movement should I be able to achieve with my hand 2012 Range Rover Westminster 4.4 TDV8
2006 Discovery 3 HSE 260k miles and still going strong with a new owner

Have you put those codes into the search function? 2012 TDV8 Vogue (L322)

Yes read about the Change over valve but wanted to
Know how much movement there should be on the vacuum pump and also could I have caused it when I took the doughnut off to do the hoses as it was fine before then 2012 Range Rover Westminster 4.4 TDV8
2006 Discovery 3 HSE 260k miles and still going strong with a new owner

I've just sorted these codes on mine today
i had taken inlet off to sort a water leak under it
there's two vacuum pipes that run over by the throttle and they had pulled out of pipes under the vacuum pump they can be reached from front and checked with a mirror or mobile
they slide in realy easy but took car for a quick run and can now hit 3000 rpm with out going into limp mode
and bank manager can sleep at night again

ill check the pipes in the morning 2012 Range Rover Westminster 4.4 TDV8
2006 Discovery 3 HSE 260k miles and still going strong with a new owner

Thanks to this community I sorted these faults on my RR.
I started having this faults and Restricted Performance after I changed the belt tensioner.
Turns out two small rubber pipes came off. I put them back in and after a small test drive I can confirm that my faults are gone.

Click image to enlarge

Glad I could help mate that’s where I had the same issues but forgot to take pictures hopefully this will help others 2012 Range Rover Westminster 4.4 TDV8
2006 Discovery 3 HSE 260k miles and still going strong with a new owner

This post helped me so much.

Exact same issue.

Changed the four doughnuts, car went into RP with the two codes P004c-77 & p004b-71 present. Traced the two vacuum lines that had come detached, refitted with cable-ties…all good!

Thank you chaps! 2012 4.4 TDV8 Westminster - Baltic Blue, Jet interior
1997 P38 2.5 DSE auto & 1998 P38 2.5 DT Manual
1988 Vogue 3.5 EFI - Manual, gone.
2004 Volvo C70 2.0T convertible, had since new.
2007 Mazda MX-5 2.0 Sport Roadster/Coupé, had since new.
2024 Mini Cooper S cabrio, JCW kit, 2.0, DCT auto