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P0488-72 (2F) Exhaust gas recirculation
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qwerty
 


Member Since: 11 Nov 2010
Location: Bristol
Posts: 118

United Kingdom 2012 Discovery 4 3.0 SDV6 GS Auto Santorini BlackDiscovery 4
P0488-72 (2F) Exhaust gas recirculation

Hi, I have this code that will not clear and restricted performance.

Thought the 3.0 SDV6 egrs were trouble free Rolling Eyes

P0488-72 (2F) Exhaust gas recirculation throttle position control range/performance - Mechanical failure - actuator is stuck open

Looking at live values on IID both say 4% and don't change, which I guess is related to the restricted performance,ie it disables them?

Any ideas anyone, which of the valves it is?

Could this be the TSOV sensor, I have checked the actuator arm moves freely but there is also a sensor there?

Cheers,

Ian.
  
Post #188886011th Dec 2017 8:46 am
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a11geo
 


Member Since: 06 Nov 2010
Location: Rhoose
Posts: 55

Wales 2012 Discovery 4 3.0 SDV6 HSE Auto Marmaris TealDiscovery 4

Hi

Did you get to the bottom of this. I had the same error code earlier. Has cleared now but doesn’t seem to be running quite right.
 MY12 D4 HSE Marmaris Teal
MY08 D3 XS Java Black - gone
MY03 D2 ES Zambesi Silver - gone 
 
Post #191624218th Feb 2018 10:37 pm
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qwerty
 


Member Since: 11 Nov 2010
Location: Bristol
Posts: 118

United Kingdom 2012 Discovery 4 3.0 SDV6 GS Auto Santorini BlackDiscovery 4

It is usually the throttle valve housing located at the top front of the engine on the air intake that causes this, but not for me!

Engine ECU fixed mine.
  
Post #191624518th Feb 2018 10:44 pm
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a11geo
 


Member Since: 06 Nov 2010
Location: Rhoose
Posts: 55

Wales 2012 Discovery 4 3.0 SDV6 HSE Auto Marmaris TealDiscovery 4

Thanks for the pointer on this. I’d also been occasionally experiencing the fluctuating revs when cruising at speed others have described. I’ve fitted the revised throttle body which seems to have rectified the issues.

I noticed the action on the butterfly valve is completely different. The original seems to have 4 steps where as the travel on the new one is smooth from fully closed to fully open.

Only thing bothering me now is the amount of water (presumably condensation) which was presant in the air box on the front of the throttle body......
 MY12 D4 HSE Marmaris Teal
MY08 D3 XS Java Black - gone
MY03 D2 ES Zambesi Silver - gone 
 
Post #191783722nd Feb 2018 11:06 pm
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JL
 


Member Since: 02 Jun 2015
Location: West coast
Posts: 50

Norway 2012 Discovery 4 3.0 SDV6 HSE Lux Auto Unknown ColourDiscovery 4

Faulty EGR on D4 is often traced to faulty throttle body . Thats why they always replace TB when doing the EGR . EGR on the D4 is thight , ask me how I know Wink
  
Post #191931826th Feb 2018 6:42 pm
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a11geo
 


Member Since: 06 Nov 2010
Location: Rhoose
Posts: 55

Wales 2012 Discovery 4 3.0 SDV6 HSE Auto Marmaris TealDiscovery 4

How do you know?
 MY12 D4 HSE Marmaris Teal
MY08 D3 XS Java Black - gone
MY03 D2 ES Zambesi Silver - gone 
 
Post #191936926th Feb 2018 8:38 pm
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JL
 


Member Since: 02 Jun 2015
Location: West coast
Posts: 50

Norway 2012 Discovery 4 3.0 SDV6 HSE Lux Auto Unknown ColourDiscovery 4

I have replaced both 8)
  
Post #191937226th Feb 2018 8:43 pm
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