Member Since: 04 Dec 2018
Location: Cheltenham
Posts: 107
Restricted performance
The wife’s D4 (125k miles) gets the message Restricted Performance popping up when she goes over 50mph.
I’ve read the fault codes and I get these two:
Any ideas what this means?
I’ve also had a rear door not unlocking and got this code:
The keyless entry motor still works, and the door locks, but you need to use keyless entry through the door in question to access.
21st Jun 2022 11:55 am
Moo D3 Decade
Member Since: 13 Aug 2010
Location: UK
Posts: 14428
Split manifold D4 HSE EU6 (Known as Jeeves)
New Defender L663 110 SE (known as Noddy!) Sold
Sold Volvo XC90 R-Design (known as Basil)
Sold - D4 HSE (Known as Gerty)
No longer the Old Buses original owner
231,000 miles and counting
05 S manual owned from March 2005
D4 Face lifted
Still original injectors and turbo
V8 Front brakes
BAS Remap, Allisport Intercooler and deCat
EGRs blanked
T-Max split charge
Hanibal Expeedition rack
Prospeed ladder
Duratrac tyres
IID BT
BAS FBH control
21st Jun 2022 11:56 am
goodo
Member Since: 04 Dec 2018
Location: Cheltenham
Posts: 107
Is it something I can fix myself, or a bit of a ballache?
21st Jun 2022 2:47 pm
nigethecat
Member Since: 11 Sep 2016
Location: Marnoch
Posts: 4244
Corris Grey D4 Commercial SE 2016
Zermatt Sliver 2007 D3 SE manual (gone)
Indus Silver D4 HSE 2015 (gone)
Bonatti Grey D3 HSE 2006 (gone)
White D3 S (LHD) 2007 (gone)
Firenze Red D4 HSE 2014 (gone)
Black RRS 3.6TDV8 2008 (gone)
Rusty Green Defender 110 1997 (gone)
Black FL2 HSE 2013 (gone)
21st Jun 2022 2:56 pm
Moo D3 Decade
Member Since: 13 Aug 2010
Location: UK
Posts: 14428
Do a smoke test to double check. D4 HSE EU6 (Known as Jeeves)
New Defender L663 110 SE (known as Noddy!) Sold
Sold Volvo XC90 R-Design (known as Basil)
Sold - D4 HSE (Known as Gerty)
No longer the Old Buses original owner
231,000 miles and counting
05 S manual owned from March 2005
D4 Face lifted
Still original injectors and turbo
V8 Front brakes
BAS Remap, Allisport Intercooler and deCat
EGRs blanked
T-Max split charge
Hanibal Expeedition rack
Prospeed ladder
Duratrac tyres
IID BT
BAS FBH control
21st Jun 2022 3:40 pm
CraigE
Member Since: 24 Dec 2020
Location: South Yunderup
Posts: 18
Can also be as simple as a split intercooler hose or popped off the fitting a little.
7th Jul 2022 7:04 am
gavwhite1972
Member Since: 11 Sep 2010
Location: Lincolnshire
Posts: 121
Re: Restricted performance
The keyless entry motor still works, and the door locks, but you need to use keyless entry through the door in question to access.[/quote]
Did you get to the bottom of this one? I have the same issue with passenger rear door. No fault code showing but the door only opens if I use keyless entry on that door... otherwise it sticks.
Locks no problem.
i also had the restricted performance issue recently, smoke tests and pressure tests came back fine. Codes kept coming up, usually when under load on an incline etc... sometimes weeks / months between it coming up, then increased in frequency until I was pulling over every couple of miles to clear the code to continue.
Eventually found a split drivers side manifold... crack must have been extremely fine initially and only pulled the fault when engine hot and under certain loads causing it to flex etc.
Manifold now replaced and all is well... apart from the rear door issue and a drivers mirror not folding every time I lock up... intermittent again.Many Thanks
Gavin White
2013 Discovery 4 SDV6 HSE
2011 Range Rover Sport TDV6 HSE (Now Sold)
2006 Discovery 3 2.7TDV SE (Now Sold)
2005 Discovery 3 4.4 V8 HSE with LPG Conversion (Now Sold)
2002 Range Rover 4.0 V8 P38 (Now Sold)
20th Jul 2022 3:54 pm
goodo
Member Since: 04 Dec 2018
Location: Cheltenham
Posts: 107
It was a cracked driver side manifold. Jonathan at Greyhill showed me the cracked one. He said LR are continually updating the part. Car still drove but I think once it starts to crack, it just opens up more and more until engine becomes very weak. He says the other side (near side) cover has been replaced before so that’s good to hear.
Whilst they were at it they did the timing belt too - it was only another hour of Labour to do, so a bit of a no brainer, I also got them to order in a replacement door latch mechanism (LR091351 for the keyless L H rear), which I decided to have a go at fitting myself as they wanted another £200 Labour to do. I’ll post some videos below on how to do it. You can buy aftermarket ones, you can even take the plastic box apart and replace just the motor, but I just got the replacement genuine LR part.
All codes cleared and running great again. 👍🏻
20th Jul 2022 4:40 pm
goodo
Member Since: 04 Dec 2018
Location: Cheltenham
Posts: 107
[url] [/url]
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20th Jul 2022 4:58 pm
goodo
Member Since: 04 Dec 2018
Location: Cheltenham
Posts: 107
Photos
Here are some photos,
Spongy stuff around the latch bolts
Iain Taylor has an eBay shop where he sells the actuators for £20 if you want to do it on the cheap. My reasoning is that if one motor has failed, the item is probably life expired. Life’s too short to be doing these things twice. See link below.
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