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
__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand Sold
2002 L322 Vogue 4.4 V8 Epson Green (Fatty Offroader) Sold
-Click for Project Fatty off roader-

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