Air Suspension fault - C1A18-64

[geoffmc]

Hi All,

I had the fault C1A18-64 Pressure increases too rapid when filling reservoir - Algorithm based failure - Signal plausibility faill

The orange triangle illuminates intermittently about 30 seconds after staring the car and resets after switching off and restarting. Has anyone seen this before and any suggestions what it may be?

cheers
Geoff

[Graeme]

My assumption is that either the pressure sensor is faulty due to over-reading or the valve to the reservoir isn't opening properly.

[geoffmc]

Hi all,

well, i believe i have rectified my issue. I purchased a new Rear Valve Block RHV000055 from Ebay. Did the fitment this morning and touch wood, no fault codes or issues so far. I will be replacing the dessicant and O rings in the compressor tomorrow, as a maintenance item. The job was a little fiddly, however was done in an hour or so.

I also purchased an O ring set for the Valve block, so will strip, clean and reassemble in the next few weeks as a spare.

cheers
Geoff