Fault code P0401-20

**disco gazza** · 18th July 2016, 03:20 PM

While doing my monthly scan of faults on my td6, it came up with
P0401-20. Extended fault path exhaust recirculation governor deviation- negative deviation.

This is from iid tool.

Cleared faults then redid the next day and the same fault came up.

Anyone have a solution to this problem.

Havent noticed any decrease in power or fuel consumption.

Thanks

cheers

**sierrafery** · 18th July 2016, 09:43 PM

Check the EGR valve to not be full of muck or some connected vacuum pipe cracked

**justinc** · 19th July 2016, 06:30 AM

You can Remove the valve and ignore if you want to. The td6 won't have a limp mode for the EGR series of fault codes it is too old tech ☺

Jc

**disco gazza** · 19th July 2016, 10:42 AM

Had a look around the EGR and found that the rubber hose that connects to the EGR has a nice split in it.

.

JC, Do you know the part number for it,I couldnt find it on my russian version of microcat.

Thanks

**sierrafery** · 19th July 2016, 01:19 PM

That ''rubber hose which connects to the EGR" is much too vague for me, do you mean one of the vacuum pipes?

**disco gazza** · 19th July 2016, 01:36 PM

Sorry its to the inlet manifold.

I rang my supplier and they only do the complete kit. From bottom of intercooler to manifold.

All I want is the top hose.

Disregard the extra hose on top.Its for temp sender.

Anyone know if these are available from parts store or are they special hose.

Thanks

**sierrafery** · 19th July 2016, 02:13 PM

Google out PNH000186 cos for me it seems very like that(part 6K683D here(scroll to bottom) http://new.lrcat.com/#!/12119/94841/98346/7824/98518 though if that one was cracked maybe it would not be a bad move to replace the whole set with silicone ones cos the others connected to the turbo might be delaminated , single silicone here http://www.ebay.com/itm/RANGE-ROVER-...3D111682555222 , or the whole set here http://www.ebay.com/itm/RANGE-ROVER-...-/111682555222 but maybe you find something closer

**disco gazza** · 19th July 2016, 02:56 PM

Hi Sierrafery,

Have rescue taped it up. Have ordered the silicone parts(complete set), so will replace them all when I get them.

cheers

**sierrafery** · 19th July 2016, 05:56 PM

Well done, i'm sure you'll feel a slight improvement in power after that cos boost used to drop on old delaminated hoses

**disco gazza** · 22nd July 2016, 07:00 AM

Didnt really feel a loss in power. Fuel has gone up a bit.

One thing I have noticed is when I put my foot down a bit or flat to the floor,I get a bit of a high pitched whistle. Its more noticeable when only put my foot down a bit. When floored you only hear the engine,the whistle doesnt increase in volume. I'm thinking that when I taped it up,I may have not got the rubber even where the split is.

Is that something that I should be concerned with?

Thanks

dg

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