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madasmad

Member Since: 22 Mar 2020
Location: Cheshire
Posts: 85

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

20th Jul 2021 6:55pm

Baltic Blue

Member Since: 13 Aug 2015
Location: North Wales
Posts: 3788

2011 Range Rover Vogue SE TDV8 Baltic Blue

Have you tried cleaning the sensor ??

Click image to enlarge

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

20th Jul 2021 8:58pm

GraemeS

Member Since: 06 Mar 2015
Location: Wagga area
Posts: 2562

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.

20th Jul 2021 9:07pm

Dolphinboy

Member Since: 07 Dec 2009
Location: Bristol
Posts: 3196

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

20th Jul 2021 9:52pm

madasmad

Member Since: 22 Mar 2020
Location: Cheshire
Posts: 85

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

21st Jul 2021 2:31am

madasmad

Member Since: 22 Mar 2020
Location: Cheshire
Posts: 85

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

21st Jul 2021 2:33am

madasmad

Member Since: 22 Mar 2020
Location: Cheshire
Posts: 85

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

21st Jul 2021 2:34am

GraemeS

Member Since: 06 Mar 2015
Location: Wagga area
Posts: 2562

Show faults, select advanced then ensure that failed, pending and confirmed are all ticked.

21st Jul 2021 2:42am

madasmad

Member Since: 22 Mar 2020
Location: Cheshire
Posts: 85

Thanks Graeme 2019 Autobiography SDV8 Byron blue/black - current
2016 Vogue SE SDV8 Santorini Black/Ivory - sold
2009 RR Sport TDV8 HSE - sold

21st Jul 2021 2:44am

GraemeS

Member Since: 06 Mar 2015
Location: Wagga area
Posts: 2562

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.

21st Jul 2021 2:48am

madasmad

Member Since: 22 Mar 2020
Location: Cheshire
Posts: 85

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 2019 Autobiography SDV8 Byron blue/black - current
2016 Vogue SE SDV8 Santorini Black/Ivory - sold
2009 RR Sport TDV8 HSE - sold

22nd Jul 2021 10:09pm

supershuttle

Member Since: 20 Mar 2011
Location: Lancashire
Posts: 3869

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 ). 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

17th Nov 2021 7:36pm

madasmad

Member Since: 22 Mar 2020
Location: Cheshire
Posts: 85

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

17th Nov 2021 7:55pm

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