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XC90 '02–'15 General Forum for the P2-platform XC90 model |
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Boost pressure faultViews : 2985 Replies : 30Users Viewing This Thread : |
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Oct 24th, 2019, 07:43 | #1 |
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Boost pressure fault
ECM 6805
Boost pressure control. Fault flow D5 2005 xc90 Hi Does anyone have any ideas to fix the above error code? Car went into limp mode twice now..... Thank you |
Oct 24th, 2019, 08:21 | #2 |
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Oct 24th, 2019, 09:14 | #3 | |
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Quote:
leaks in vacuum units or hoses Turbo pressure hose leaks intercooler leak , boost control valve etc etc Vacuum pump etc etc
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Oct 24th, 2019, 16:29 | #4 |
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...not forgetting coked-up turbo inlet guide vanes.
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Oct 24th, 2019, 16:39 | #5 |
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that is on the top of my list i published above ! but at the least likely end
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Oct 24th, 2019, 17:58 | #6 |
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Ah - didn't spot that.
However I feel that it is actually very likely for a MY2005, especially if it uses engine oil. It could be leaking from the turbo seals into the air charge and that will result in coked-up turbo vanes. It will also fill the inlet pipe downtream of the EGR plenum with goo, which would be a clue. Take a look inside there - its very easy to get to.
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Greg Last edited by gmonag; Oct 24th, 2019 at 18:01. |
Nov 14th, 2019, 18:52 | #7 |
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Redex DFP Cleaner solved Pressure and limp problems
I had this problem for months and checked and replaced many items. As a last resort, and due to a 50% off deal at Tesco, I decided to try Redex. Did the trick and has never gone into limp again. Also feel an increase of power. I added half a bottle of injector cleaner to 50 litres of fuel. I did that twice. The big change was using a full bottle of Redex DPF Cleaner to 50 litres of fuel. Problem sorted.
As hard as it may be to believe, my 2004, 2.4 XC90 has never run better since doing this. |
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Nov 14th, 2019, 21:21 | #8 |
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Nov 14th, 2019, 21:46 | #9 | |
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Nov 24th, 2019, 19:16 | #10 |
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Thank you for all your replies. I also tried some redex and turbo cleaner that you place in the fuel. Just starting with the easiest fixes first.
That seemed to have reduce the occurrences. It disappeared for a few weeks and came back again today. I’m going to add some more and also clean the boost control valve. https://youtu.be/BPtABczQk3E Will update and continue monitoring before performing more expensive repairs Thanks again for everyone’s input. Very much appreciated and confident will find the solution. At the minute, a code reader reset seems to be keeping the gremlin at bay |
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