Hi everyone.

Had the dreaded restricted performance message appear on my well maintained 2013 144k mile SDV8 L405, just as I was about to prepare it to sell - typical!

Checked the code and reading P006A-00, removed sensors, cleaned, replaced ran OK until second turbo kicks in, then same limp mode.
Ended up removing plenum, throttle body, EGR pipe etc as they were caked in heavy soot/oil - very nasty...
Anyway put back together nice and clean, cleared codes, drove 2 miles, but exactly same problem.
Investigated again and the throttle body/sensor etc had a fresh layer of oil over the insides.

Any suggestions as to where this oil may be coming from please as im sure this must be the problem??

Much appreciated.

Thankyou


Neil.

Have you just changed the oil filter by any chance?

No, but it had a service not that long ago, probably done 1000 miles since.
Is this relevant maybe?

There is a chance that the oil filter drain valve may have come off it's post underneath the filter. Worth taking the filter out and having a look.

Good shout Kevin... was just about to chirp in the same advice...

kevinp wrote:

There is a chance that the oil filter drain valve may have come off it's post underneath the filter. Worth taking the filter out and having a look.

Interesting... How does this lead to excessive oil getting into the throttle body / intake pipework, etc? New one on me? <<--- BTW, this is a genuine question!

Jon 1992 RR Classic 3.9 efi Vogue
2014 Disco 4 HSE
===================
Both my fatties now gone...
Previous: 2011 L322 4.4 TDV8 Vogue SE /// 2002 L322 4.4 V8 HSE /// 2009 Discovery 3 2.7 TDV6 XS /// 2004 Defender 90 TD5 /// 1993 110 V8 Snatch Landrover /// 2005 Discovery 3 2.7 TDV6 SE (Aus) /// 1990 110 Isuzu 3.9 County (Aus) /// 1976 Series III Trayback (Aus)

I don't realy know to be honest. Someone on here did explain what happens if it's misplaced.
My car started using a lot of oil and smoking out the exhaust. It was diagnosed as needing 2 new turbo's at about £7000.
I found mine had come off it's post. After refitting it has not used a drop of oil since and no more smoke and I still have £7000.
What I did notice before finding the problem was that the MAP sensor was soaking wet instead of dry and powdery.

Thanks Kevin,

Will do a search for that post, as I'd love to know how incorrect oil filter installation leads to oil getting into the intake system? I'm speculating it's via a breather if the top of the engine is filling up with oil?

I wonder how many people have shed out an awful lot of money on unnecessary repairs, when the fix may be as simple as the oil filter not being seated correctly on its post?

Jon 1992 RR Classic 3.9 efi Vogue
2014 Disco 4 HSE
===================
Both my fatties now gone...
Previous: 2011 L322 4.4 TDV8 Vogue SE /// 2002 L322 4.4 V8 HSE /// 2009 Discovery 3 2.7 TDV6 XS /// 2004 Defender 90 TD5 /// 1993 110 V8 Snatch Landrover /// 2005 Discovery 3 2.7 TDV6 SE (Aus) /// 1990 110 Isuzu 3.9 County (Aus) /// 1976 Series III Trayback (Aus)

Bloody hell who diagnosed that Kevin?  overfinch modified

It's not that the oil filter is not correctly installed, it's the drain back valve that comes off it's locating post.

Click image to enlarge

Click image to enlarge

caymanblack wrote:

Bloody hell who diagnosed that Kevin?

To be fair the car gave all the symptoms of blown turbo's.
I discovered the problem of the valve becoming detatched and nobody seems to have mentioned before that this can happen.
That's why I say to always check it is firmly in place before installing a new filter.

kevinp wrote:

It's not that the oil filter is not correctly installed, it's the drain back valve that comes off it's locating post.

Turns out that the plenum had split along the seam slightly causing an air leak. Not sure if this was there before or if I damaged it cleaning to be honest...

I thought I was clever, opened up the seam a bit with a Dremel, cleaned and filled with epoxy plastic padding which I used before with great success as it goes rock solid. Alas, twas not to be, within 5 minutes it had blown apart again so I now definitely need a new one.

Looking around they seem to be £600-£700 unless anybody has another solution maybe??

Cheers

Neil.

Chain rivet the seam with pop rivets or self tapping screws. The turbo hits just under 1.5bar above atmospheric so quite a lot of pressure.

Blimey, thats very inventive!!