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NOx Sensor
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Oscarsball
 


Member Since: 29 Apr 2017
Location: East Sussex
Posts: 41

England 2008 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3
NOx Sensor

Had the engine management light come on and obviously throw up some codes. Just been to Land Rover garage I use who have said that it’s egr valve so no probs there as am going to get them blanked by them and they also throw in a engine remap with it. But they have also said that it is showing a NOx sensor problem and needs investigation. Could someone please explain what this is and likely causes and also outcome ie costs involved.

Cheers
 

Last edited by Oscarsball on 22nd Nov 2017 4:41 pm. Edited 1 time in total 
Post #188244722nd Nov 2017 3:10 pm
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lynalldiscovery
 


Member Since: 22 Dec 2009
Location: Maidstone
Posts: 4090

United Kingdom 2006 Discovery 3 TDV6 Metropolis LE Auto Bonatti GreyDiscovery 3

Part of the function of the egr is to reduce the nox from the system so it may be the remap knocks the nox on the head anyway!
 No Illeism here.  
Post #188248822nd Nov 2017 4:38 pm
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Oscarsball
 


Member Since: 29 Apr 2017
Location: East Sussex
Posts: 41

England 2008 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

Thank you for that. Been doing some searches but can’t seem to find a lot about it.

Cheers
  
Post #188249122nd Nov 2017 4:40 pm
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lynalldiscovery
 


Member Since: 22 Dec 2009
Location: Maidstone
Posts: 4090

United Kingdom 2006 Discovery 3 TDV6 Metropolis LE Auto Bonatti GreyDiscovery 3

I cant tell you much about the disco version, but can bore you to death on the trucks.

Euro 4 had two temp sensors pre and post cat then they added one nox sensor after the scr cat , if if thought nox was high it injected more adblue, pretty reliable.
Euro5 same set up but with another nox sensor pre scr cat, still cause issues now but most are well known.
Euro6 same set up as E5 plus a dpf, egr and a ammonia cat, as for issues well the list is endless and the problems many, not unusual for a truck to go back to the dealer many times before it is fixed.
 No Illeism here.  
Post #188249922nd Nov 2017 4:55 pm
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Oscarsball
 


Member Since: 29 Apr 2017
Location: East Sussex
Posts: 41

England 2008 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

Thanks again for more info. The only things I seem to be able to find where discovery’s are concerned is for the d4 onwards,p and about the adblue. Can’t find anything relating to d3

Cheers
  
Post #188251022nd Nov 2017 5:13 pm
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hugeviking
 


Member Since: 08 Jun 2010
Location: cotswolds
Posts: 1150

United Kingdom 2006 Discovery 3 TDV6 S Manual Cairns BlueDiscovery 3

Never heared any mention of nox sensor on D3.
??

Andi.
  
Post #188256822nd Nov 2017 7:40 pm
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Oscarsball
 


Member Since: 29 Apr 2017
Location: East Sussex
Posts: 41

England 2008 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

So far doing search after search I can’t find any mention of one either
  
Post #188257022nd Nov 2017 7:42 pm
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BrettKaz
 


Member Since: 11 Nov 2013
Location: Canberra
Posts: 172

Australia 2007 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

Thought they were on DPF models - though DPF has 2 sensors I think egt and nox .. didn't think DPF was sold in the Uk

edit just checked my IID live values which have place holders for the sensor data and the 2 sensor are temps upstream and downstream of DPF... not nox which, as above euro 6
  
Post #188266123rd Nov 2017 12:28 am
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Oscarsball
 


Member Since: 29 Apr 2017
Location: East Sussex
Posts: 41

England 2008 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

Thanks for reply so does that mean a 2008 D3 does not have 1.

Cheers
  
Post #188268423rd Nov 2017 8:21 am
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lynalldiscovery
 


Member Since: 22 Dec 2009
Location: Maidstone
Posts: 4090

United Kingdom 2006 Discovery 3 TDV6 Metropolis LE Auto Bonatti GreyDiscovery 3

Have you stuck you head underneath to see if theres a dpf?
 No Illeism here.  
Post #188279323rd Nov 2017 1:58 pm
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Somewhere.
Posts: 57479

United Kingdom 2011 Discovery 4 3.0 SDV6 HSE Auto Zermatt SilverDiscovery 4

UK D3s didn't have DPFs, later Eurozone ones did but not UK ones. Thumbs Up
 

11 D4 HSE - just Dee, no more Double Disco. Sad

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Post #188279823rd Nov 2017 2:05 pm
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