Dear All,

I have read:

Home > Maintenance & Mods (L322) > 4.4TDV8 P040D-00(2F) EGR temp sensor A - Where's the sensor?
Home > Technical (L322) > P040D-00 (2F) EGR temperature sensor replacement
https://www.fullfatrr.com/forum/topic50202.html


I have:

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Hi you won't find this on your IIDTool readings. And you will find Sensor 2, Bank 1 etc are dead ends. I've been through a few months of investigation as you may have read in those posts.

Can I just check you have read them? I'm only asking because you seem like you are still searching but I can say conclusively, note my screen shot at the beginning of https://www.fullfatrr.com/forum/topic50202.html which also says ....circuit high. Perhaps I should make it clearer?

That code, as those two threads conclude, relate to a fairly undocumented temperature sensor on the NS (that is right hand side if standing in front of the car) exhaust manifold. It's not on or near the EGR, DPF or Cat converter.

It's a common error however it is unusual that you have limp mode from that.

So I think you may have another cause of limp. Check the intake hoses very carefully for cracks. You may need to remove the hoses to check as they can crack under the clips. When these go there can be no error code present and you can get restricted performance.

Do you have any other errors? Here to help.

Also, no screenshots in your OP.



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

@gonna_go_double_r

Thank you for the feedback. Picture should be up - forgot the click to add!
I'll check the hoses, but it is definitely the only fault code currently

I have read it again

I'm now confused

I was under the understanding there could be a couple of temperature sensors link to this fault code given that Bank 2 - sensor 1 is correct reading 100 deg c until you boot it?
You then use the IID to understand which sensor is not working?
Both are on the NS but it could be LR052169 or LR035741
I understood Bank 2 - sensor 1 to be LR052169 but this may not be correct?

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Quote:

Once I get into the guts of the bonnet this weekend I will pull both sensors to see if it changes the IID reading

[/quote]

I wouldn't bother, none of those sensors or values affect this error code, just check hoses first.

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

Thank you - hoses first point to check, i'll feed back on findings

The hoses have already been changed to the newer design so should be OK if the clips are tight enough.
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

Thanks Mike. Good to know they updated them for the 2014 model.

Does any one else have hooting noise like a pigeon when taking their foot off the throttle?

When I accelerate averagely, throttle say 2000 rpm and then take my foot off the throttle i get the noise? I always put it down to the turbos, but its not a sustained turbo whine, its a pulsed hoot of three pulses.
You don't hear it at high revs or speed due to noise.

The flutter when backing-off is likely to emanate from the primary, variable vane turbo as it adjusts to accommodate the changed airflow, possibly in conjunction with the closing of the secondary turbo inlet isolation valve.

Well I still have no idea what Bank 2 Sensor 2 is?

From testing I know that Bank 2 Sensor 1 is on the NS down pipe post turbo, pre DPF Temperature Sensor. LR035741.

This is accessible underneath with a 14mm spanner.

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Geez well done you have been busy.

Glad you got rid of the error code, changing the manifold sensor is quite a job.
I liked your simple test of plugging it in before fitting, nice

It was also good to see how different access is on the 405.
Your long articulated socket / extensions combo seemed to do the job!
Good to see the long tube on the WD40 bottle too!

But your limp mode remains.

One not-so-obvious thing to check - when I changed my air filters, I forgot to plug the air sensor back in and it started in restricted mode. No errors on the IID were showing but then when I realised I plugged the sensor back in and it went away.

Maybe a sensor or connection could be loose?
Have a good root around if you haven't already.

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

Last edited by GGDR on 17th Feb 2019 5:25pm. Edited 1 time in total

Quote:

I then tried to check if this was Bank 2 Sensor 2

Thanks @gonna_go_double_r. The effort in your write up really helped get the sensor change in an afternoon as opposed to a long time head scratching - which is evident you had to do!

Isn't this noise just a turbo actuator. (Dump valve )letting off pressure .
Mine does it .4.4 tdv8 2011.

Tore2ls wrote:

Thanks Mike. Good to know they updated them for the 2014 model.

Does any one else have hooting noise like a pigeon when taking their foot off the throttle?

When I accelerate averagely, throttle say 2000 rpm and then take my foot off the throttle i get the noise? I always put it down to the turbos, but its not a sustained turbo whine, its a pulsed hoot of three pulses.
You don't hear it at high revs or speed due to noise.

Landyandy1765, I think you are correct. The noise was nothing to do with the problem. The issue was a different temperature sensor that wasn't showing up on the fault code reader. The faulty temperature sensor was just before the cat and DPF.[/quote]