What Can Cause Vanos Fault Code

George.E89 said:
I have read the solenoids are interchangeable and when I swapped them last time the car drove perfectly fine until the fault code came back again

What would you say are the list of things I should try ?
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The fault code came back on the same side? Exhaust or inlet? Or moved with the change of unit?
 
B21 said:
I don’t know if you can swap intake / exhaust Vanos units around ..

If you look at this fault code amongst N54 on other cars then oil pressure / quality are indicators of this behaviour…

So anything that improves oil pressure / quality is something to try..

Often these faults boil down to marginal issues where some cars suffer and others don’t ..
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So then for oil pressure definitely check the filter cage is secure and has all the seals fitted.
 
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enuff_zed said:
So then for oil pressure definitely check the filter cage is secure and has all the seals fitted.
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Will do thank you
B21 said:
Tends to suggest the unit ..what does ISTA fault diagnistics and checks say?
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I’ve used MHD fault checks which shows the same code as another diagnostics tool I have, I’ll swap the Vanos round and if the code swaps again I’ll return them
 
George.E89 said:
Will do thank you

I’ve used MHD fault checks which shows the same code as another diagnostics tool I have, I’ll swap the Vanos round and if the code swaps again I’ll return them
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When you get into the weeds you need either a proper tool like Bimmergeeks Protool or even BMWs ISTA to bottom these class of faults out.l
 
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