Hi there guys,

P040D-00 (2F) Exhaust gas recirculation temperature sensor A


Wanting to do this job. It's one many leave as they have no symptoms but I've just had my DPF taken off and cleaned and want to give it the best chance of survival!

I know there are many discussions / threads about this one, but none have as far as I can find documented the job of changing the sensor.

I have been studying the workshop manual but can't find the location of this sensor.

I thought it would be sensor marked 4 on this diagram, but apparently it's on the other side - the RHS (as you look at the engine with the bonnet open) in the exhaust manifold.

Item 4. It screws into the pipe leading from the EGR valve as the pipe heads towards the front.

Reference Microcat 2012. I changed mine but can't recall the scene.

Last edited by GraemeS on 26th Jul 2018 8:19am. Edited 1 time in total

Greg,
There’s a really clear picture on here somewhere that Nino posted up when his was all stripped down.
Sorry, I am in a rush to get out this morning, but will find it later if Nino doesn’t respond before I get back.

Mike. G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.
https://www.fullfatrr.com/forum/topic56162...tty+affair

Mike.

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Greg,
I have just seen your PM , having spent much of this very hot day sat around in car parks waiting for she who must be waited for, but I took the opportunity to take a new set of live values.

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Sounds like you're doing some excellent chauffeur work there Mike. Def deserves a cold beer.
[/img] Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

Greg,
It doesn’t help that they keep changing direction of pictures in WM, but in this picture it definitely says No. 5 EGR temp. Sensor.

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Yes - thanks Mike. And in the picture I posted it's No.4 and the same sensor in the pic you posted it's No. 5 .
I just can't see anything on the RH Exhaust side related to EGR.

Under the ENGINE CONTROLS section, there are two exhaust temp sensors.

Interestingly, I have these live values:

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Greg,
I have just read through a list of TSB’s that I download off Topix when I was getting sections of the WM.
Sorry, I can’t find any reference to this fault on there.

I will take some more live readings tomorrow, particularly the exhaust Gas Temp bank 2 , to see if mine is also showing 100c.
I will make a note of any that appear duff., and assume the ones that give a reading are working OK.

Mike. G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.
https://www.fullfatrr.com/forum/topic56162...tty+affair

Ah thank you Mike for checking the TSB's! Shame nothing there...

I looked at your live values but I saw you only had 2 of the 4 exhaust temp reading showing but yes it would be interesting to see what yours is reading, especially as, if I remember correctly, you also have the P040D-00(2F) fault code.
. Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

Greg,
I have had these two Fault codes showing since July 2017.
I have tried to clear them many times but without any success.

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Hi again guys,

I've been through not only the workshop manual but now also microcat diagrams and can only find the one EGR sensor marked 4 at the top of this thread. It's the same one that's marked 5 on the diagram Mike posted and also from Nino's picture. You'd think this is the sensor causing the P040D-00(2F) error but I've had knowledgeable advice that the sensor marked 4 & 5 in the diagrams is not the one causing the P040D-00(2F) error.

Apparently, the offending sensor is on the RHS (as you look at the engine with the bonnet open) exhaust manifold. That's a different location to the sensor marked 4 & 5.

To kinda shed a little light on this theory, the readings I'm getting on Exhaust Gas Temp - Bank 2 - Sensor 1 tell me that this sensor has failed as it shows 100deg constantly. See my post with a IIDTool screen grab a few posts up. Notice in the screen grab it's called "Exhaust Gas Temp", not "EGR Temp Sensor" which the error code states.

I've love to know where these four Exhaust Gas Temp sensors are located, especially Bank 2 - Sensor 1.

The error code also says P040D-00(2F) EGR temp sensor A - the 'A' indicates there may be more than one.

Definitely confused.com

It might be that I have two duff sensors, two separate issues. I'm a bit stuck on this, any help most welcome!

Thanks,
Greg Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

Two sensors are located in the right exhaust pipe on Euro5 engines. The top one close to the manifold is labelled as an oxygen sensor and the lower one close to the cat is just labelled a sensor WDN500130 in 2012 Microcat but google shows as an EGT sensor.

Another EGT sensor LR022893 (now LR052169) is located in the left manifold, probably the one you referred to as being in the right manifold when looking at the engine.

Another EGT sensor LR022894 is located in the exhaust behind the DPF.

Perhaps disconnect 1 sensor at a time, checking which one doesn't trigger a new fault.

Graeme, you're a gent! That's extremely helpful!

I'll get under the bonnet and get a start unplugging them as a basic way of identification, great idea.

Since it says Bank 2 - Sensor 1 my money's on what I'd think'd be the first one off the engine. The one you are saying is labelled as an oxygen sensor.

Where are you viewing Microcat?

Thanks, Greg
. Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

Greg,
The Microcat is in the Wiki, thanks to a link found by Nino.
(Microcat in English)

http://allbrit.de/LR.cfm?SPRACHE=EN

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