Hi!

I've got the fault code:

P023D-22 (2F) Manifold absolute pressure - turbocharger/ supercharger boost sensor A correlation - General signal failure - signal amplityde>maximum

Any idea's what could be causing it?

Thanks!

That basically means the pressure measured by the MAP (Near air box) is providing a different reading to Sensor A whish is inside the air intake. (IIRC)

Burst hose or other inlet leak or hole or a faulty MAP or sensor A...

Live values may help to narrow it down...  Pete
__________________________________________________
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2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
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Thanks for the detailed reply!

I just got my IID tool yesterday. How do I conduct live values readings?

Sorry I'm new to using the tool and also RR ownership!

Thanks

Mani absolute pressure 1 : 100.0 kPa

Mass Air Flow 1: 44280.0g/hr

Mani absolute pressure 1 : 102.0 kPa

Mass Air Flow 1: 32400.0g/hr

Are these the readings required?

Thanks

Best way to diagnose a potential hole/crack/split in the system is with a HIGH pressure smoke test.
Not all places to do it. Lots do a LOW pressure one but that's not good enough to diagnose.
 Gone to a good home: 2011 4.4 TDV8 Vogue SE Buckingham Blue with Ivory and clear glass = "Rory"
2025MY Defender D350 90 in Silicon Silver on coils
1974 Series 3 Lightweight = "Millie"
Many, many other Landies over the years
My preferred specialist: www.glenrands.co.uk
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Cool! Thanks for the advice, any idea on a brand or make so I can buy one?

Take the top two hoses off and have a look.

I had the same fault along with black smoke on boost, and a lack of power.

Sure enough, split hose on RHS underneath.

It’s a couple of worm clamps, 5 mins at best.

https://www.advancedfactors.co.uk/intercooler--hoses-1949-c.asp

https://www.lrdirect.com/PNH500510-supplie...ROVER.html

https://www.lrdirect.com/PNH500500-supplie...ROVER.html


I’ve ordered this:

https://www.lrdirect.com/DA4781-supplied-b...TPART.html

Which according to LRdirect is ‘silicon hoses’, according to britpart themselves is coolant hoses

https://www.britpart.com/parts/performance...ses/da4781

And according to island4x4 is actually intercooler hoses, so we’ll see what turns up

https://www.island-4x4.co.uk/hose-intercoo...37387.html

There are a few home made smoke machines using a cigar on youtube... Hope that helps sir

Thanks for all the replies! I've ordered 4 new hoses from my local LR garage. They should be here by Friday so I'll keep you guys posted. I'm also bidding on a leak detector machine to have even if the issue is fixed as all four cars are Turbo cars.

I'll put up the results on how it goes. Thanks

Jazzy wrote:

Take the top two hoses off and have a look.
I had the same fault along with black smoke on boost, and a lack of power.

Sure enough, split hose on RHS underneath.

It’s a couple of worm clamps, 5 mins at best.

https://www.advancedfactors.co.uk/intercooler--hoses-1949-c.asp

https://www.lrdirect.com/PNH500510-supplie...ROVER.html

https://www.lrdirect.com/PNH500500-supplie...ROVER.html



I’ve ordered this:

https://www.lrdirect.com/DA4781-supplied-b...TPART.html

Which according to LRdirect is ‘silicon hoses’, according to britpart themselves is coolant hoses

https://www.britpart.com/parts/performance...ses/da4781

And according to island4x4 is actually intercooler hoses, so we’ll see what turns up

https://www.island-4x4.co.uk/hose-intercoo...37387.html

I can confirm they are intercooler hoses, took me 15mins end to end

Click image to enlarge

So thanks to everybody who replied on this topic, I appreciate it.

The update is:

I ordered the four smaller hoses from my local LR dealership.

Click image to enlarge

Click image to enlarge