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ijwebb



Member Since: 04 May 2015
Location: United Kingdom
Posts: 15

United Kingdom 2008 Range Rover Sport Supercharged Fuji White
P0430-00 (E8) Catalyst system efficiency below threshold

I am getting the following fault code on my 2005 4.2 SC

P0430-00 (ECool Catalyst system efficiency below threshold (bank 2)

If I clear it, it comes back after around 100miles or so. The date stamped on the catalytic converters is 2012 and the car has only done 87K miles and seems to be running fine, so it seems unlikely the catalytic converters would be at fault, so I'm guessing it is a faulty lambda sensor, but I can't figure out from this code which one it would be.

Grateful if anybody point me in the right direction.

My fallback otherwise is to buy one and systematically swap each in turn, assuming they are all the same. From looking at the car the connectors look the same, but the post cat connector wires look longer. So hopefully buying one of these would be good enough.

Regards,
Ian.

Post #463350 Sun May 31 2015 12:44pm
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Col



Member Since: 02 Sep 2012
Location: Hawkes Bay NZ
Posts: 1964

New Zealand 2013 Range Rover Sport Supercharged Autobiography Santorini Black

Does this help if you can manage to read it, not a very good print.



Cheers
Col

Post #463369 Sun May 31 2015 5:18pm
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ijwebb



Member Since: 04 May 2015
Location: United Kingdom
Posts: 15

United Kingdom 2008 Range Rover Sport Supercharged Fuji White

thanks Col, this is all I had managed to find too. It looks a bit extreme in terms of approach including changing the catalytic converters. I'm fairly sure it is a lambda sensor. You would have thought the error code would make it obvious which one, but doesn't seem like that.

Post #463387 Sun May 31 2015 7:33pm
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RRSTDV8



Member Since: 13 Aug 2011
Location: Northamptonshire
Posts: 6057

United Kingdom 2008 Range Rover Sport TDV8 HSE Stornoway Grey

The engine banks are A - right, B - left. Might be reasonable to assume that Bank A = Bank 1 and Bank B = Bank 2 in the error codes. Left and right are when sitting in the car facing forwards I believe.

There are 4 sensors in total, two sensors per side, one each before and after the catalysts. 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

Post #463392 Sun May 31 2015 8:01pm
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ijwebb



Member Since: 04 May 2015
Location: United Kingdom
Posts: 15

United Kingdom 2008 Range Rover Sport Supercharged Fuji White

To try and confirm i've identified the right one, I swapped the bank 1 and 2 post cat sensors over today so waiting to see if the fault reoccurs on the other bank.

Post #463497 Mon Jun 01 2015 9:19pm
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ijwebb



Member Since: 04 May 2015
Location: United Kingdom
Posts: 15

United Kingdom 2008 Range Rover Sport Supercharged Fuji White

Today I got the same fault code back. That's after a couple of weeks and a few hundred miles with no issue. I was rather hoping that if the fault came back it would be on the other bank having swapped over the sensors, apparently not.

What I have noticed is that the fault only ever occurs (so far) when I've been driving at a constant speed on the motorway for some time. Don't know what to make of that. Grateful if anyone has any ideas ?

I have just got myself the IIDTool but unfortunately that doesn't enable monitoring of cats and it's not found any other issues.

I have now noticed that on bank with the trouble the pre cat sensor looks quite new, so maybe it is more efficient / sensitive than older ones. May be clutching at straws but the cats are fairly new and the car seems to be running fine. Anyhow I've just ordered a new sensor and with fingers crossed will try again.

Post #464805 Tue Jun 16 2015 6:25pm
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Camelrock



Member Since: 31 Aug 2013
Location: North Yorkshire
Posts: 938

United Kingdom 2008 Range Rover Sport TDV8 HSE Tangiers Orange

If it was a lambda Spenser it would say so in the fault code ie bank 1 sensor 1 or sensor 2 depending. Sensor 1 being pre cat. 2008 G4 RRSport TDV8 current
2009 TDCi 90 current
2016 Discovery Sport HSE current
1994 Dakar current

Post #464810 Tue Jun 16 2015 7:01pm
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tom0311



Member Since: 01 Apr 2016
Location: witney
Posts: 240

United Kingdom 2009 Range Rover Sport Supercharged Autobiography Santorini Black

Same thing happened to me today. Car driving fine though. Very old thread I know, but I'm curious if OP managed to work out what was up?

Post #541340 Sun Nov 19 2017 3:29pm
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ijwebb



Member Since: 04 May 2015
Location: United Kingdom
Posts: 15

United Kingdom 2008 Range Rover Sport Supercharged Fuji White

Yes, I fixed it. Unfortunately by fitting a new cat. had a local garage make for me at a reasonable price.

Post #541341 Sun Nov 19 2017 3:32pm
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tom0311



Member Since: 01 Apr 2016
Location: witney
Posts: 240

United Kingdom 2009 Range Rover Sport Supercharged Autobiography Santorini Black

Thanks for replying. Shame it wasn't just a sensor. Did the issue ever affect the car or put it into restricted performance mode? Or did you just get EML over and over?

Post #541345 Sun Nov 19 2017 3:42pm
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