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What happens at 2200rpm ?
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Sundayjumper
 


Member Since: 23 Sep 2024
Location: Berkshire
Posts: 104

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Auto Indus SilverDiscovery 4
What happens at 2200rpm ?

I'm slowly working on tracking down the cause of a P006A-00 error, "Manifold absolute pressure - mass or volume air flow correlation".

It doesn't do it every time but I've come to notice that when it does do it, it's consistently at 2200rpm. I can cruise at 70-80 no problem (<2k rpm). I can drop a few gears and accelerate up & down 3-4k rpm no problem. It's accelerating moderately hard through 2200rpm that seems to do it.

From what I've read the second turbo kicks in at 2800rpm so it's not that, not directly anyway.

Any ideas ?

I'm perversely hoping it's the inlet manifold(s) so I can buy some alloy ones Very Happy  
Post #23808742nd Nov 2024 8:21 pm
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Tyty
 


Member Since: 18 Aug 2022
Location: South West
Posts: 81

United Kingdom 2014 Discovery 4 3.0 SDV6 HSE Auto Fuji WhiteDiscovery 4

Similar to what I had,

Secondary turbo kicks in around 2.5k.

With a boost leak the the measured air flow is not what the computer is expecting and throws an error. Get a smoke test done to confirm.

I have been running alloy manifolds for over a year, all good!   
Post #23809774th Nov 2024 10:05 am
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Manorbleak
 


Member Since: 16 Jun 2021
Location: Cambs
Posts: 24

England 

I would say your wish has been granted Very Happy A smoke test will probably confirm it.  
Post #23809784th Nov 2024 10:28 am
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Sundayjumper
 


Member Since: 23 Sep 2024
Location: Berkshire
Posts: 104

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Auto Indus SilverDiscovery 4

Tyty wrote:
Similar to what I had,

Secondary turbo kicks in around 2.5k.

With a boost leak the the measured air flow is not what the computer is expecting and throws an error. Get a smoke test done to confirm.

I have been running alloy manifolds for over a year, all good!

I take it the manifolds cured it then ?

I'm a bit strange... I do all my own spannering and don't like other people working on my cars, I'd genuinely rather spend a weekend doing manifolds than a couple of hours taking it somewhere for a smoke test to see if it's the manifolds. I know it's not logical Laughing  
Post #23809814th Nov 2024 11:19 am
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