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DISCO3.CO.UK > Faults & Fixes (D4)

Intermittent Reduced Performance message
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disco1212
 


Member Since: 17 Feb 2020
Location: Ireland
Posts: 6

Ireland 2010 Discovery 4 3.0 TDV6 HSE Auto Stornoway GreyDiscovery 4
Intermittent Reduced Performance message

I've had this "Reduced Performance" message on my 2010 LR4 for about 18 months now. It comes on when I turn the ignition on and stays on but then the next time it seems fine and will go away for months. There is no noticeable reduction in performance. A year ago when it was serviced I asked the technician who plugged in his diagnostic gadget in and it said water in fuel sensor so he changed the fuel filter and sensor and it was ok for a bit but then the message started appearing again intermittently so I mentioned it this time at it's latest service a couple of weeks back and it came up with the same error again - water in fuel sensor so he changed the fuel filter and sensor again and it was ok for a few days then it came back again. And now it's gone again. What's going on??  
Post #212180617th Feb 2020 5:08 pm
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thisandy
 


Member Since: 28 Jan 2018
Location: Pembrokeshire
Posts: 308

Wales 2010 Discovery 4 3.0 TDV6 HSE Auto Zermatt SilverDiscovery 4

Have you changed the whole fuel filter housing.?. https://www.lrparts.net/lr045519-fuel-filt...rover.html  
Post #212182217th Feb 2020 6:08 pm
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disco1212
 


Member Since: 17 Feb 2020
Location: Ireland
Posts: 6

Ireland 2010 Discovery 4 3.0 TDV6 HSE Auto Stornoway GreyDiscovery 4

Hmm I’m not sure if he did. He mentioned the fuel filter and sensor but not the housing. Thanks for the tip.  
Post #212185517th Feb 2020 7:53 pm
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disco1212
 


Member Since: 17 Feb 2020
Location: Ireland
Posts: 6

Ireland 2010 Discovery 4 3.0 TDV6 HSE Auto Stornoway GreyDiscovery 4

thisandy wrote:
Have you changed the whole fuel filter housing.?. https://www.lrparts.net/lr045519-fuel-filt...rover.html


Actually I just checked the bill and he did indeed change the fuel filter housing too.  
Post #212186517th Feb 2020 8:17 pm
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electroxav
 


Member Since: 30 May 2018
Location: LYON
Posts: 1

France 2010 Discovery 4 3.0 TDV6 HSE Auto Zermatt SilverDiscovery 4
same problem

Hello
I have exactly the same problem as you for 1 month have you found the solution ??? thank you xavier in france sorry for my english  
Post #212247220th Feb 2020 2:58 pm
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disco1212
 


Member Since: 17 Feb 2020
Location: Ireland
Posts: 6

Ireland 2010 Discovery 4 3.0 TDV6 HSE Auto Stornoway GreyDiscovery 4

No I haven’t unfortunately. Message came back again yesterday.  
Post #212248620th Feb 2020 3:51 pm
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 5052

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

You will need the diagnostic codes read which should point the direction. Success here depends on what diagnostic tool is being used! It may well just be a small issue like a blocked MAP / sensor, or an issue with a one of the MAF sensors / air leak etc.

In a worst case scenario you could have a look at the inlet manifolds and see if there is a crack present. The presence of oil or charred / dry oil residues is an indicator. If so a smoke test will then confirm. yµ (idµ - eAµ) ψ=mψ

  
Post #212249320th Feb 2020 4:07 pm
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Asbestross
 


Member Since: 18 Apr 2019
Location: Herefordshire
Posts: 153

United Kingdom 

I had this issue - I drained the fuel filter which cured it for about 6 months, then it came back just before the service. I've just had the whole housing done and it's been fine for about a month so far.

I used my little diagnogstic tool to clear the Water in Fuel code. 2003 Freelander Commercial 2.0 TD4 (Oslo Blue) SOLD
2013 Range Rover Vogue SE 3.0 TVD6 (Luxor Gold) SOLD
2013 Discovery 4 HSE 3.0 SDV6 (Aintree Green) SOLD
Made in Japan since 2022  
Post #212255120th Feb 2020 7:24 pm
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MorganD379
 


Member Since: 29 Sep 2016
Location: SA62 3PP
Posts: 425

Wales 

I used to get the water messages when ever I used fuel from tesco... Steered clear of them and haven't seen it since, oh wife didn't as worked night's there - last year spent nearly 1k on injectors Shocked  
Post #212261821st Feb 2020 4:00 am
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MorganD379
 


Member Since: 29 Sep 2016
Location: SA62 3PP
Posts: 425

Wales 

Missed out she doesn't drive my D3 Whistle  
Post #212261921st Feb 2020 4:01 am
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disco1212
 


Member Since: 17 Feb 2020
Location: Ireland
Posts: 6

Ireland 2010 Discovery 4 3.0 TDV6 HSE Auto Stornoway GreyDiscovery 4

PROFSR G wrote:
You will need the diagnostic codes read which should point the direction. Success here depends on what diagnostic tool is being used! It may well just be a small issue like a blocked MAP / sensor, or an issue with a one of the MAF sensors / air leak etc.

In a worst case scenario you could have a look at the inlet manifolds and see if there is a crack present. The presence of oil or charred / dry oil residues is an indicator. If so a smoke test will then confirm.


I purchased an Autel AP200 OBD diagnostic thing but it’s not throwing up any errors at all even when the Restricted Performance is showing.  
Post #212325123rd Feb 2020 3:11 pm
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disco1212
 


Member Since: 17 Feb 2020
Location: Ireland
Posts: 6

Ireland 2010 Discovery 4 3.0 TDV6 HSE Auto Stornoway GreyDiscovery 4

MorganD379 wrote:
I used to get the water messages when ever I used fuel from tesco... Steered clear of them and haven't seen it since, oh wife didn't as worked night's there - last year spent nearly 1k on injectors Shocked


Interesting. We tend to use our local garage to fill up rather than a supermarket but I wonder if some premium diesel would make a difference.  
Post #212325223rd Feb 2020 3:16 pm
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Gary_P
 


Member Since: 03 May 2016
Location: Kent
Posts: 1670

Ukraine 2016 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4

Don't know about premium diesel but I'm thinking, as a minimum, it would be worth filling up somewhere else for a bit.
Cheers Gary
-------------------------------------------

Discovery 4 HSE 2016MY  
Post #212330123rd Feb 2020 7:58 pm
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