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HELP! Restricted Performance but no codes!
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Moo
D3 Decade 


Member Since: 13 Aug 2010
Location: Wiltshire
Posts: 13802

Ukraine 2005 Discovery 3 TDV6 S Manual Zambezi SilverDiscovery 3
HELP! Restricted Performance but no codes!

Hopefully the great and good on the forum can help me with my car.

I was driving on the motorway with cruise control when Restricted Performance (RP) red triangle came on and the car started slowing. I pulled onto the hard shoulder and left the engine running. The engine revs fine with no issues. Switched the car off and let it go to sleep. Restarted and the light was out accelerated gingerly on the hard shoulder and rejoined the motorway only for the same thing to happen.

Pulled off at a service station let it go to sleep and restarted it. Drove gingerly again gently building up speed and got to 70mph. As long as i didn't need to put my foot down and accelerate the car was OK, but as soon as I try to accelerate the RP triangle comes on and it slows. When I plug my IID in it shows NO error codes. Confused

I took it into my local indi and he test drove it and couldn't get it to repeat the RP but also couldn't see any codes. As soon as i drove it home it the RP triangle came on and it slowed down.

The engine revs OK and sounds fine but the car feels 'heavy' when driving. Its all bit odd. I've attached some video (taken by my daughter) that shows the revs rising but the speed staying low. There doesn't appear to her any gear changing when left in auto so I tried to see what would happen with the paddles, which is the video attached.

Anyway, all help appreciated.

 New Defender L663 110 SE (known as Noddy!)

Sold Volvo XC90 R-Design (known as Basil)

Sold - D4 HSE (Known as Gerty)

No longer the Old Buses original owner Sad
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 
 
Post #217473419th Sep 2020 4:18 pm
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Hardware
 


Member Since: 28 Jun 2016
Location: Hiding under the M60
Posts: 12676

United Kingdom 2011 Discovery 4 3.0 SDV6 XS Auto Sumatra BlackDiscovery 4

have you recently re-fuelled ?
  
Post #217474219th Sep 2020 5:39 pm
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Moo
D3 Decade 


Member Since: 13 Aug 2010
Location: Wiltshire
Posts: 13802

Ukraine 2005 Discovery 3 TDV6 S Manual Zambezi SilverDiscovery 3

A full tank about a week ago. The engine seems fine.
 New Defender L663 110 SE (known as Noddy!)

Sold Volvo XC90 R-Design (known as Basil)

Sold - D4 HSE (Known as Gerty)

No longer the Old Buses original owner Sad
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 
 
Post #217474419th Sep 2020 5:49 pm
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grzesiul
 


Member Since: 11 May 2008
Location: UK
Posts: 6265

Poland 2016 Discovery 4 3.0 SDV6 SE Auto Loire BlueDiscovery 4

Hey Moo it might be long shot but have you tried checking / cleaning mass airflow sensosrs?
Rgsd
Greg
  
Post #217481320th Sep 2020 7:11 am
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dgarside
 


Member Since: 17 Jan 2010
Location: Holmfirth
Posts: 732

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Auto Aintree GreenDiscovery 4

This may also be a long shot, and no offence meant 😂 but have you changed settings on the IID app (if using BT version) to show all faults? Mine showed no errors when I got restricted performance until updated settings on Fault screen to show pending or something like that.
 RLD CB Bracket
RLD Spare Wheel Protector
RLD Sump Protector
ProSpeed Compressor Cover
TPMS Retrofit
Range Rover Digital Dash Upgrade
Tesla Style Android Screen Upgrade 
 
Post #217481720th Sep 2020 7:42 am
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Moo
D3 Decade 


Member Since: 13 Aug 2010
Location: Wiltshire
Posts: 13802

Ukraine 2005 Discovery 3 TDV6 S Manual Zambezi SilverDiscovery 3

I haven't checked IID but it is registering some faults regarding the radio, however, my Indi also couldn't pull up any codes. Confused

I'm loath to go to a main dealer, I've lost faith in them based on past experience. I don't believe they are mechanics, more like technicians and part swappers so I could end up with a long bill and no further forward.

I'll clean the MAF and see if that does anything. Its really frustrating because I desperately need the car.
 New Defender L663 110 SE (known as Noddy!)

Sold Volvo XC90 R-Design (known as Basil)

Sold - D4 HSE (Known as Gerty)

No longer the Old Buses original owner Sad
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 
 
Post #217483220th Sep 2020 9:46 am
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grzesiul
 


Member Since: 11 May 2008
Location: UK
Posts: 6265

Poland 2016 Discovery 4 3.0 SDV6 SE Auto Loire BlueDiscovery 4

Try to see if air intake body connected ot manifold aint loose as well as it would / could cause perfo issues
what radio codes you getting ?
G
  
Post #217483320th Sep 2020 9:53 am
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L319
 


Member Since: 14 Dec 2013
Location: Herefordshire
Posts: 2079

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3

Am I being thick, but surely if the restrictive performance warning is on, there must be a fault to generate it, and that will be logged somewhere?
  
Post #217484720th Sep 2020 10:22 am
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Moo
D3 Decade 


Member Since: 13 Aug 2010
Location: Wiltshire
Posts: 13802

Ukraine 2005 Discovery 3 TDV6 S Manual Zambezi SilverDiscovery 3

You'd think so, but nothing on my IID or the Indi's system hence the challenge of finding it. Sad
 New Defender L663 110 SE (known as Noddy!)

Sold Volvo XC90 R-Design (known as Basil)

Sold - D4 HSE (Known as Gerty)

No longer the Old Buses original owner Sad
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 
 
Post #217485320th Sep 2020 10:42 am
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James W
 


Member Since: 27 Mar 2008
Location: Wirral, UK
Posts: 3056

United Kingdom 

One thing I would check is all air hoses really well - remove and give a good inspection for delamination inside and also splits that aren't immediately visible.
 D4 XS, gone, much loved, never forgotten
2018 FFRR SDV8 Autobiography - WTF does this button do 
 
Post #217486220th Sep 2020 11:33 am
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Oswiperus
D3 Decade 


Member Since: 02 Apr 2010
Location: Chelmsford, Essex
Posts: 1590

United Kingdom 2005 Discovery 3 TDV6 SE Auto Java BlackDiscovery 3

As previously mentioned, when I had RP on the D4, it didn’t show any codes on IID but if you select advanced iirc then a code popped up. In my case it was MAF and RP was permanent so doesn’t appear to be same fault but you may find a code using advanced hopefully.
 Stu

2016 D4 Landmark current
2022 Defender D300 SE Gone Sad
D4 2014 XS Commercial - Gone Sad
D4 2016 hse lux montalcino red - Gone
D3 2005 se java black - current
D3 2005 base manual - gone Sad
D2 1999 TD5 E white - current 
 
Post #217486420th Sep 2020 11:34 am
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SteveNorman
 


Member Since: 14 Oct 2005
Location: Somerset
Posts: 1144

United Kingdom 

Hi Moo,
If it has come up with that message, there is a stored code.
Many aftermarket equipment doesn’t show a ‘pending’ code, one that has faulted, but hasn’t happened often enough to set a ‘hard’ code.

Go into options on iid and select pending codes, and all other options, except one, show all codes (or something like that from memory).
If you are unsure I’ll post tomorrow from work the screenshot of what I have ticked on the options.

Regards
Steve
  
Post #217488520th Sep 2020 1:53 pm
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Moo
D3 Decade 


Member Since: 13 Aug 2010
Location: Wiltshire
Posts: 13802

Ukraine 2005 Discovery 3 TDV6 S Manual Zambezi SilverDiscovery 3

Thanks to Steve from T&S Norman, the mystery has been solved. Very Happy

Its a split manifold. The other was replaced last year. The weird thing is that the symptoms were different hence sort of dismissing it.

On another note, I now know how to use my IID properly. Embarassed

Thanks for everyones input and thanks Steve for your help and support as always. Thumbs Up
 New Defender L663 110 SE (known as Noddy!)

Sold Volvo XC90 R-Design (known as Basil)

Sold - D4 HSE (Known as Gerty)

No longer the Old Buses original owner Sad
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 
 
Post #217513121st Sep 2020 7:10 pm
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