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P0046, P140d and P0405
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Eddynoodles
 


Member Since: 17 Aug 2021
Location: Somerset
Posts: 2

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Manual Siberian SilverDiscovery 3
P0046, P140d and P0405

Hi all, New Disco 3 owner and loving the thing dispute its many known issues but hey, life would be boring if everything went perfectly.
I have what I guess is a common problem in That after getting the revs above 2500 it has started saying Engine system fault and going into limp home mode.
I have bought an icarsoft scanner and the error codes read

P0046 Turbo boost control solenoid circuit range/performance
P140d EGR control circuit B performance
P0405 EGR sensor A circuit

Question is, is it more likely that the EGR valves are causing the issue with the boost and if I change the EGR valves the Turbo will read fine? or do I have 2 issues as such.
thanks in advance
Eddy
  
Post #224700717th Aug 2021 1:17 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10547

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

I would say you have 3 issues. Turbo, EGR one side, EGR other side.
However, I think you can ignore the EGR ones.

You need to get in through the passenger wheel arch and see if the turbo linkage is free.
If its stiff, thats probably the reason for the turbo code

https://www.disco3.co.uk/forum/topic122113.html

If it is stiff, try adding wynns VVT cleaner to the fuel tank.


If performance is still poor, blank your EGR's with shimms
  
Post #224701517th Aug 2021 2:02 pm
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Eddynoodles
 


Member Since: 17 Aug 2021
Location: Somerset
Posts: 2

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Manual Siberian SilverDiscovery 3

Thanks Pete, will give a go this weekend, if I blank the EGRS off will I need to have it remapped or anything?
  
Post #224702217th Aug 2021 2:27 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10547

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

not on a 2005
  
Post #224702417th Aug 2021 2:31 pm
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