Hi all, first real issue with my 2011 VSE, air suspension works fine , goes up and down in under 10 seconds BUT then becomes inactive . IID shows fault that the reservoir is filling too slowly. I have checked live values and the reservoir pressure goes from 220 to 36 in the blink of an eye, do you think this would be a sensor issue? Any thoughts gladly received. 2015 4.4 AB
GSXR 1000 K5
R1 1998

just a guess but is the the air compressor exhaust filter ok..maybe it needs a drill hole in it.. ... - .- -.




Y. O. L. O.
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Thanks Stan , i will have a look later  2015 4.4 AB
GSXR 1000 K5
R1 1998

I can only talk from D3 experience but the pressure dropping like that is normal. Once the reservoir is filled the pressure on my D3 would drop from 260Psi to 20Psi. This is due (I believe) to the reservoir valve closing to isolate the reservoir and the compressor then exhausts the excess pressure. There can also be an issue that the exhaust cycle doesn't drop the pressure sufficiently so you get a C1A13 - Pressure does not decrease when venting gallery.

The car is raised using the stored pressure in the reservoir which is then replenished as the pressure drops. If you monitor the live values as it fills, does it sit at 220 for long? What does the compressor temperature look like? On the D3 it should get to 260Psi before it cuts out (and I suspect the FF is the same) so it sounds like the compressor is unable to achieve the required pressure to satisfy the system that the reservoir has been filled to the target pressure? Hence the C1A20 code.

Sounds like either a faulty compressor or a leaking reservoir? 2016 Skoda Octavia VRS Estate
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<gone>2015 BMW 520D SE (not my favourite car)</gone>
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Thanks Mike , i will try that and see what the live values say.  2015 4.4 AB
GSXR 1000 K5
R1 1998