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PC76



Member Since: 01 Oct 2017
Location: Northwest
Posts: 378

United Kingdom 
L494 4.4 P006A-84(27) restricted performance fault

Hi all I have just come back from a weekend away with the caravan and whilst towing uphill I got the restricted performance warning. I plugged in my IID and got the following fault code.

P006A-84 (27) Manifold absolute pressure - mass or volume air flow correlation - Bus signal/message failure - signal is below allowable range

Now my old 2010 sport had a similar issue and ended up being a split manifold and I hoped I had let all those worries behind with the 4.4 😰.

A brief search mainly brought back split hoses, leaking manifolds and blocked DPF’s but didn’t see anything that related specifically to the 4.4 engine. So I’m after some help to identify the problem.

Thx 2015 4.4 Autobiography
2010 3.0 HSE 162K - Gone

Post #625810 Mon Aug 01 2022 6:02pm
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Disco_Mikey



Member Since: 08 Apr 2012
Location: Dundee, Scotland
Posts: 4079

United Kingdom 

They suffer from split turbo hoses between the plenum and manifolds mostly

They do also suffer from split plenum and manifolds, but quite rare (so far)

Post #625814 Mon Aug 01 2022 8:28pm
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PC76



Member Since: 01 Oct 2017
Location: Northwest
Posts: 378

United Kingdom 

Thx DM.

I assume then a physical check is needed or would a Jerry rigged low pressure smoke test do the trick? 2015 4.4 Autobiography
2010 3.0 HSE 162K - Gone

Post #625817 Mon Aug 01 2022 10:03pm
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PC76



Member Since: 01 Oct 2017
Location: Northwest
Posts: 378

United Kingdom 

Disco_Mikey wrote:
They suffer from split turbo hoses between the plenum and manifolds mostly

They do also suffer from split plenum and manifolds, but quite rare (so far)


Hi DM, would you be referring to this part?

https://www.lrparts.net/lr056285.html 2015 4.4 Autobiography
2010 3.0 HSE 162K - Gone

Post #625907 Thu Aug 04 2022 4:05pm
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