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madasmad



Member Since: 22 Mar 2020
Location: Cheshire
Posts: 84
United Kingdom 2019 Range Rover Autobiography SDV8 Baltic Blue
Restricted Performance

Hi, I have been having the dreaded restricted performance coming up for weeks now and this has been resolved by clearing the codes with my GAP tool. The engine only does this when doing 50mph+, uphill and accelerating using a quarter throttle. Put your foot down and there are no problems. However no codes of any relevance were shown on the tool. I managed to get it to my mechanic with the car in restricted performance mode and the following fault was detected;

Code is P006A-84
Manifold Absolute Pressure - Mass or volume airflow correlation.

He thought it was probably a hose but after smoke testing them he could not find any leaks. Has anybody got any ideas what this is please? 2019 Autobiography SDV8 Byron blue/black - current
2016 Vogue SE SDV8 Santorini Black/Ivory - sold
2009 RR Sport TDV8 HSE - sold
Post #601301 20th Jul 2021 6:55pm
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Baltic Blue



Member Since: 13 Aug 2015
Location: North Wales
Posts: 3765
United Kingdom 2011 Range Rover Vogue SE TDV8 Baltic Blue

Have you tried cleaning the sensor ??

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Mike G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.
https://www.fullfatrr.com/forum/topic56162...tty+affair
Post #601321 20th Jul 2021 8:58pm
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GraemeS



Member Since: 06 Mar 2015
Location: Wagga area
Posts: 2475
Australia 2012 Range Rover Autobiography TDV8 Bournville

Not helping with the problem but your Gap tool needs a setting changed so that it shows all faults. For some reason the tool is supplied without the appropriate setting.
Post #601322 20th Jul 2021 9:07pm
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Dolphinboy



Member Since: 07 Dec 2009
Location: Bristol
Posts: 3138
United Kingdom 2011 Range Rover Vogue TDV8 Atacama Sand

cracked inlet manifold I reckon. Thats what I had. Always at the same spot on the M4, slight incline and little throttle required - RP!!
Post #601330 20th Jul 2021 9:52pm
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madasmad



Member Since: 22 Mar 2020
Location: Cheshire
Posts: 84
United Kingdom 2019 Range Rover Autobiography SDV8 Baltic Blue

Thanks Mike, let’s give it a go! 2019 Autobiography SDV8 Byron blue/black - current
2016 Vogue SE SDV8 Santorini Black/Ivory - sold
2009 RR Sport TDV8 HSE - sold
Post #601337 21st Jul 2021 2:31am
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madasmad



Member Since: 22 Mar 2020
Location: Cheshire
Posts: 84
United Kingdom 2019 Range Rover Autobiography SDV8 Baltic Blue

GraemeS wrote:
Not helping with the problem but your Gap tool needs a setting changed so that it shows all faults. For some reason the tool is supplied without the appropriate setting.


Thanks Graeme, you don’t happen to know which setting by any chance do you? 2019 Autobiography SDV8 Byron blue/black - current
2016 Vogue SE SDV8 Santorini Black/Ivory - sold
2009 RR Sport TDV8 HSE - sold
Post #601338 21st Jul 2021 2:33am
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madasmad



Member Since: 22 Mar 2020
Location: Cheshire
Posts: 84
United Kingdom 2019 Range Rover Autobiography SDV8 Baltic Blue

Dolphinboy wrote:
cracked inlet manifold I reckon. Thats what I had. Always at the same spot on the M4, slight incline and little throttle required - RP!!


Thanks DB, if it were this should it have shown on the smoke test? 2019 Autobiography SDV8 Byron blue/black - current
2016 Vogue SE SDV8 Santorini Black/Ivory - sold
2009 RR Sport TDV8 HSE - sold
Post #601339 21st Jul 2021 2:34am
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GraemeS



Member Since: 06 Mar 2015
Location: Wagga area
Posts: 2475
Australia 2012 Range Rover Autobiography TDV8 Bournville

Show faults, select advanced then ensure that failed, pending and confirmed are all ticked.
Post #601340 21st Jul 2021 2:42am
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madasmad



Member Since: 22 Mar 2020
Location: Cheshire
Posts: 84
United Kingdom 2019 Range Rover Autobiography SDV8 Baltic Blue

Thanks Graeme Thumbs Up 2019 Autobiography SDV8 Byron blue/black - current
2016 Vogue SE SDV8 Santorini Black/Ivory - sold
2009 RR Sport TDV8 HSE - sold
Post #601341 21st Jul 2021 2:44am
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GraemeS



Member Since: 06 Mar 2015
Location: Wagga area
Posts: 2475
Australia 2012 Range Rover Autobiography TDV8 Bournville

Dolphinboy wrote:
cracked inlet manifold I reckon. Thats what I had. Always at the same spot on the M4, slight incline and little throttle required - RP!!
It would be the 1st that I've heard of on a L405 for which the 4.4s started with a revised inlet manifold, which may have been introduced on the last of the L322 engines too as those engines had quite a few enhancements starting early calendar year 2012.
Post #601342 21st Jul 2021 2:48am
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madasmad



Member Since: 22 Mar 2020
Location: Cheshire
Posts: 84
United Kingdom 2019 Range Rover Autobiography SDV8 Baltic Blue

So the sensor was cleaned but made no difference. The Land Rover technical bulletin was consulted and it transpires that the fault code is a known issue which is caused by an airflow parameter being exceeded resulting in the issues I was having. Land Rover have a software update which has been applied and the problem seems to be resolved.

Many thanks for everyone’s input Bow down 2019 Autobiography SDV8 Byron blue/black - current
2016 Vogue SE SDV8 Santorini Black/Ivory - sold
2009 RR Sport TDV8 HSE - sold
Post #601549 22nd Jul 2021 10:09pm
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supershuttle



Member Since: 20 Mar 2011
Location: Lancashire
Posts: 3779
England 2013 Range Rover Autobiography SDV8 Luxor

I know this is an old thread but today I had exactly the same problem, acceleration up hill then Restricted Performance slowed me down (I wasn't going that fast Rolling with laughter ). It all cleared when I stopped for lunch!. Is this a software update that can only be done by a main dealer or can I do it myself using IIDTool? Geoff
Post #612965 17th Nov 2021 7:36pm
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madasmad



Member Since: 22 Mar 2020
Location: Cheshire
Posts: 84
United Kingdom 2019 Range Rover Autobiography SDV8 Baltic Blue

I believe it can only be done by either a main dealer or a LR specialist who has access to this software. 2019 Autobiography SDV8 Byron blue/black - current
2016 Vogue SE SDV8 Santorini Black/Ivory - sold
2009 RR Sport TDV8 HSE - sold
Post #612975 17th Nov 2021 7:55pm
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