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Fault Codes
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lindyloo
 


Member Since: 16 Feb 2015
Location: lincoln
Posts: 16

2006 LR3 TDV6 S Auto Java BlackLR3
Fault Codes

hi all,alittle query to test your knowledge.Ive been experiencing problems with my 06 disco 3 it keeps going into limp home mode,the diagnostic comes up with code PO642,but we cant see what it refers to,has anyone come across this one before or have an idea where I can possibly check it? Without me having to go to main dealers.Ive tried changing brakelight switch and had EGR valves blanked off today Big Cry
  
Post #142763516th Feb 2015 3:56 pm
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Lost for Words
 


Member Since: 03 Sep 2013
Location: Warminster, Wiltshire
Posts: 6703

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

BAS Website wrote:
P0642

Sensor reference voltage A – circuit low


Don't know what sensor this refers to. I'm assuming something like the MAF or boost pressure/temp? Confused

May be worth ruling out the battery too. Thumbs Up
 Current: Discovery 3 06MY (55 reg) HSE Auto Zambezi Silver Zambezi Silver Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
Freelander 2 2007 HSE Manual Tambora Flame
Previous: FL2 56 reg SE Manual Black (written off Sad )
Disco 3 06 reg B7S Manual Rimini Red Rimini Red
Disco 2 TD5 Y reg ES Manual Blue - Chipped Very Happy
Several Discovery 300 TDis
 
 
Post #142767416th Feb 2015 4:56 pm
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Discogaz
 


Member Since: 17 Mar 2014
Location: Bracknell
Posts: 1399

United Kingdom 2008 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

http://engine-codes.com/p0642.html
  
Post #142768716th Feb 2015 5:29 pm
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Disco_Mikey
 


Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20835

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

Unplug the EGR valves and see if it still happens Thumbs Up
 My D3 Build Thread

TDV8 Retrofit Build Thread 
 
Post #142773816th Feb 2015 6:39 pm
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lindyloo
 


Member Since: 16 Feb 2015
Location: lincoln
Posts: 16

2006 LR3 TDV6 S Auto Java BlackLR3

thankyou for your replies,ive disconnected the EGR valve connectors and it appears to have sorted my problem,no warning lights visible and no more limphome mode touch wood. It would appear that one or both of the EGR valves were jammed and still trying to draw current to operate them causing dash lights to appear,plus HDC not working,suspension lowered itself,limited gears available[1 gear its an auto]parkbrake fault.I hope this helps anyone else who may have or is experiencing similar problems
  
Post #142926119th Feb 2015 10:51 am
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Iguana
 


Member Since: 14 Oct 2013
Location: 'Sunny' Zomerset
Posts: 9424

Ukraine 

get yourself a EGR blanking kit Thumbs Up £10ish
 Iggy/Ieuan

Current LR =
2015 RR Sport Autobiography
&
1992 Land Rover Defender Camper

- Gone but not forgotten:
MY10 D4 GS
MY05 Disco 3 'S'
MY14 FL2 HSE manual in Blue
MY15 Disco 4 HSE Lux in Santorini Black
MY08 Disco 3 SE manual in Buck Blue
1960 Series 2 88" (No idea why I sold it!) 
 
Post #142930619th Feb 2015 12:22 pm
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Disco_Mikey
 


Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20835

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

Been there, done that Thumbs Up
 My D3 Build Thread

TDV8 Retrofit Build Thread 
 
Post #142934719th Feb 2015 1:21 pm
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DiscoZack
 


Member Since: 12 Feb 2015
Location: Cambridge
Posts: 173

United Kingdom 2006 Discovery 3 TDV6 Metropolis LE Auto Java BlackDiscovery 3

Maybe off topic Embarassed I'm looking for Premium ICE fault codes.

Does anyone have any documentation about the fault codes on the 6CD-465 IHU in the hidden menu setup?

Mine is showing E00331, DA0362, F00004 and E00388!

I PM'd Colin but it's not something he's come across.

Thx
  
Post #143065721st Feb 2015 6:38 pm
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JoeHale87
 


Member Since: 12 May 2014
Location: Lymington, Hampshire
Posts: 34

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

I have a EGR blanking kit fitted.... Does this mean I can disconnect the plug from the Valves with no adverse affect?
  
Post #143200223rd Feb 2015 9:12 pm
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lindyloo
 


Member Since: 16 Feb 2015
Location: lincoln
Posts: 16

2006 LR3 TDV6 S Auto Java BlackLR3

yes you can just unplug them,they are a bit fiddly to get at though.
  
Post #143341426th Feb 2015 8:57 am
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