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timmyt79
Member Since: 18 Oct 2016
Location: Pemrokeshire
Posts: 589
  
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| P0046 -ESF but No smoke,new pipes an d blanked egr's |
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Hi
So still trying to get to bottoem of my esf limp mode issues on 2005 tdv6.
ONLY error code according to iid tool is P0046 which as im sure you know relates to boost control solenoid.
So far i have blanked egr's,replaced the two larger intercooler hoses and secured with Mikalor clamps and lubricated the actuator arm along with cleaning the MAP and MAF sensors.Also replaced lpfp.
Notes~Bottom of intercooler hoses were covered in oil both sides,seems to be a few dents in intercooler face and i pulled a 'stick' from between fins.Pulled connector from MAF sensor and it seemed to make no difference.Map gets to around 180/90 kpa whilst accelerating but no more really.
Maf is registering about 17gs at idle (from memory)
So do i just go ahead and takle the job of replacing turbo (body on and on driveway) or throw more money replacing MAF sensor and getting a new intercooler (RS500) and seeing if this resolves.Think Map sensor is ok?Is all that oil a sign of blown turbo seal along with maybe cracked intercooler?
Whats the general thinking that if you only have the ONE code p0046 and nothing else then it IS or IS NOT likely to be the turbo and should look elsewhere?
Thanks in advance,guess i just need a little reassurance before i go spending alot of money!
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 1st May 2017 7:45 pm |
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dreynolds10
Member Since: 11 Jun 2013
Location: Berks
Posts: 166
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A "little" Oil at the bottom of the intercooler pipe is normal. I had the same worry when I replaced mine but apparently it's ok as long as it's not excessive.
Unfortunately I don't have an answer to your issues but sounds like you have checked the majority of the easy issues. Before you do spend more money though have you also checked the small pipe from the charger that goes into the metal charge pipe before the intercooler?
Just a thought  Disco3 project
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| 1st May 2017 8:03 pm |
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timmyt79
Member Since: 18 Oct 2016
Location: Pemrokeshire
Posts: 589
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I did take a look at that one and although intially it was very dirty after a clean up i couldnt see any noticable splits but as im sure you know that little one is notorious for being hard to remove and hard to see faults with.I do have a replacemnt silicone one so i guess i shoul dget my hands in there and change it!
Im thinking intercooler next as im sure its probably blocked with all that oil?
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| 1st May 2017 8:08 pm |
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dreynolds10
Member Since: 11 Jun 2013
Location: Berks
Posts: 166
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Yep,it is a  to replace. If you are changing the IC anyway then no harm in replacing the easy large pipe first with your silicon hose then the IC and working backwards to the charger.
At least that you have covered all the basis and eliminating each component as you go.
Good luck  Disco3 project
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| 1st May 2017 8:13 pm |
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timmyt79
Member Since: 18 Oct 2016
Location: Pemrokeshire
Posts: 589
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lol im guessing you have been there then!?
awaiting to hear back from a member on here ref RS500 intercooler and if all goes ahead ill swap out the small one at same time,along with chucking some cleaner down there!
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| 1st May 2017 8:20 pm |
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timmyt79
Member Since: 18 Oct 2016
Location: Pemrokeshire
Posts: 589
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Little update...
After taking up way too much of Pete @BAS' time online yesterday (thanks once again!) He has me believing that the P0046-00 (38) code is actually very likely to be electrically related.
So could be wiring to actuator or maybe maf and/or map sensor? (Although I don't get any codes relating to them)
I have ordered a new inter cooler anyway,and am currently 'trying' to check wiring to solenoid.
Has anyone experienced this specific code before ?
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| 5th May 2017 7:01 am |
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snow?wotsnow?
Member Since: 01 Nov 2009
Location: Somerset
Posts: 24
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| Another cause of P-0046 - fixed |
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Having read up about this fault code here - mine turned out to be something not mentioned before (unless I missed it).
Same symptom as many others have experienced: Give it too much right foot to accelerate uphill and ESF pops up and limp mode is activated. Bring the vehicle to a halt, without needing to switch off (reboot) and power is restored but without cruise control facility. You can drive off again. If you reboot, normal function is restored.
Paul at CWS 4x4 in Glastonbury is the master of the subject who detected the cause and resolved this. He checked that the turbo actuator was mobile but gave it some extra lubrication anyway and then looked at the O-rings where the air intake enters the manifold. After 20 years and 201,000 miles they were somewhat perished and evidently letting air in, which was confusing the calculations in the ECU.
New O-rings - problem solved. --------------
05MY SE with BBS_SPY heated steering wheel conversion. Bought new in December 2004.
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| 13th Oct 2024 11:13 am |
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