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Emissions high - service required

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Old Jan 17th, 2008, 07:24   #1
narva
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Default Emissions high - service required

When engine is warm I keep getting this error message: "Emissions high..."
I followed instructions to clean inlet: cleaning inlet plenum/manifold

After these steps I felt that engine power came back again. But after second engine restart I was back where I was before cleaning inlet: I get error message "Emissions high..." and the engine power is volatile.

Any thoughts, ideas ?
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Old Jan 17th, 2008, 22:44   #2
Paul Clifton
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Default Emissions

You have a fault somewhere in the engine management system, you need to get the codes read.


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Old Jan 23rd, 2008, 07:43   #3
narva
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Codes were read. Hear is what was stored:

1) ECM-4405 (Flow too high - defective EGR valve)
2) ECM-6805 (Boost pressure control - Faulty flow)

Could EGR valve cause Boost pressure DTC if it is full of soot and oil ?
Or these both sensors need to be replaced ?

Last edited by narva; Jan 23rd, 2008 at 07:45.
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Old Jan 23rd, 2008, 22:21   #4
Paul Clifton
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Default codes

From the codes you quote it sounds as though you have an air leak on the induction side. Prime culprits are intercooler/turbo hose split or the intercooler itself is leaking/split. Look for any excess oil arround the hoses or bottom of radiator/intercooler/evaporator (all bolted together).

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Old Jan 24th, 2008, 06:27   #5
narva
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My understanding was that if it is intercooler related issue then there should be black smoke coming from exhaust, right ?
But there is none.

By visually checking hoses and intercooler I didn't see any signs of oil...
What I noticed after checking 2nd time my inlet manifold was that it was oily inside, is this normal ?

I seem to believe I need to clean EGR valve/actuator before buying new one. But removing it is not an easy job as high
pressure pump lies on top of it...

Last edited by narva; Jan 24th, 2008 at 07:42.
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Old Jan 26th, 2008, 16:20   #6
Paul Clifton
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Default codes

Oil in manifold is normal. Perhaps EGR stuck open in that case. It can be removed without disturbing the pump but a bit fiddly.
In this case it seems to me codes are hnot particulary related. Boost pressure code still indicates a possible air lek or perhaps faulty boost pressure sensor (unlikely) or a faulty turbo boost control valve TCV or pipework associated.

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Old Jan 28th, 2008, 08:20   #7
narva
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After I cleaned EGR system, no emission related errors appear. The emissions cooler (3) was full of soot, also the valve(2) shifted badly...

No I am about to clear DTC, but no success with ELM327. I can read codes easily, but after clearing it the same code is still in ECM. Or may Volvo doesn't allow to access this area of ECU ???

Has anyone experience with ELM327 vs V70 D5 ?

p.s. How to convert general OBD codes to Volvo equivalent? (P04010 -> ECM-4405 )
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