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Discussion Starter · #1 ·
p0169 (Vadis = 250a) incorrect fuel composition can't get rid of....

Hi all,My first post


I have a 2005 S40 2.4I,
Recurring P0169, VADIS code 250a
Dealer's changed MAF, crankcase ventilation hose
But it keeps coming back,
Any Hints?

Thanks all
Franky
 

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Re: p0169 (Vadis = 250a) incorrect fuel composition can't get rid of.... (fender123)

Those are good first steps, but there are many more that can be done since they didn't work:

Quote »
Diagnostic trouble code (DTC) information ECM-250A

Condition

The engine control module (ECM) receives information from the heated oxygen sensor (HO2S) about the fuel/air mixture at different loads. The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that the fuel/air mixture deviates too much from target lambda value, leaving the long-term trim in one of its limit positions.

Substitute value
-None.

Possible source

Upper limit
-Air leaks in the induction system.
-Air leakage in the exhaust system.
-Low fuel pressure
-Damaged mass air flow (MAF) sensor
Lower limit
-Oil level too high.
-Contaminated engine oil
-Leaking injectors
-Damaged EVAP valve.
-High fuel pressure
-Damaged mass air flow (MAF) sensor

Fault symptom
-Deterioration in performance
-High fuel consumption.


Are you unhappy with the dealer's work so far? I'd recommend taking it back.

Tom.
 

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Discussion Starter · #3 ·
Re: p0169 (tmtalpey)

Thanks Tom,
I'll look at these and take it to another dealer if I can't find an air leak.


I have a generic OBD2 reader and software, Ill try seeing if I can tell if it's upper or lower limit, I really hope it's upper....

Kindly,
frank.
 

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Discussion Starter · #4 ·
success!

In the process of changing my oil filter I noticed a hose that's not so evident to see hidden between the block and coil packs on top that was disconnected


CEL gone.....

Thanks for the extra info on the ECM error Tom, saved me a bunch of money and grief.
 

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Re: (fender123)

Good one. Is the hose you found a sort of elbow, connecting to the oil trap unit that the filter is part of? If so, that's a common source of issues. It can crack, in particular, as well as pop off under increased pressure if the dreaded oil trap diaphragm issue hits you. That's under an extended warranty here in the US so keep an eye out.

Tom.
 

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Discussion Starter · #6 ·
Yikes...
That's the one.
Guess I'll have to take a look at my diaphragm too lol...

CEL is back but I haven't had time to go get a new hose it was ghetto taped together so it might have gotten undone.
 
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