Discovery 3 suspension error

Good morning. My car is currently getting a suspension error normal ride height only (amber) once the ignition is switched off and on the error is gone for a short time. Had thr codes read this morning and I'm getting a U0132 CAN connection of ride height levelling ECU and instrument cluster disturbed CAN fault disturbed communication. And also C1A11 pressure reservoir storage pressure increases. Accumulator not active. Can anyone help out on this please. Many thanks

Message @gstuart he is your man for codes.
Most of the time it is an air leak or a weak compressor.
It will be almost impossible to diagnose it remotely, but you can certainly narrow it down.

If you are going to keep the car you really need your own code reader, Icarsoft not bad for 100 quid, Gap IID same but can programme, but cost is 400 plus quid!

Garage checked the compressor. Speed temp and voltage etc and all is ok. Reckons it could be wiring or a valve. Waiting for a call back to see what they recommend for next steps. I had the front upper suspension arms done a few months back but they don't think that they would cause any issue.

Jay8135 said:

Garage checked the compressor. Speed temp and voltage etc and all is ok. Reckons it could be wiring or a valve. Waiting for a call back to see what they recommend for next steps. I had the front upper suspension arms done a few months back but they don't think that they would cause any issue.

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Ah more info is good, check the wiring at the height sensors especially the ones where the arms have been done, they are very thin and can break.

Pretty unusual to change front upper arms, front lower and rear uppers are common.

There was a wiring mod done on the loom when the cars were in warranty up near the compressor somewhere, vid on youtube, I will see if I can find it.
Edit I lied it was the handbrake loom mod!

Hi

Plus 1 what’s been mentioned by @lynall

Accumulator is ur air tank, so would indeed also check ur reservoir valve and associated wiring , the loom where it runs along the chassis and behind the compressor can rub through causing that fault code

easy to check the voltages at the connector , plus the 5 v at the pressure sensor

ref to the U code , Plse ensure ur battery is good , check with the engine off and running with a multimeter as a low or bad battery can cause a lot of issues

hope that helps

Still not got to the bottom of this due to not being well (covid) I've checked for leaks around the car with a washing up liquid solution and spray bottle but nothing untoward that I can see. The issue can come on one day and the car is fine for a few days then it will come back. Things I've noticed which I'm unsure is supposed to happen. I park on a slight hill facing down and a slight lean on the road from passenger side to driver side. Every time I turn off the car I get out and I hear and see a slight drop in the height. In the morning when I start the car the compressor kicks in for approx 40-50 seconds stops and an audible sound of air being pushed out is this normal? On first start up sometimes the car levels itself sometimes it doesn't is this due to the engine off self levelling through night and being parked as I am causes the self levelling to keep trying to level and would this cause the compressor to kick in every morning to fill the reservoir? Tomorrow I'm going to pull the fuse and measure any drops and also remove the compressor cover and spray around it and see if any leaks are visible. Also sometimes not always the back rear passenger tyre bounces on the 4x4 screen when I'm parked and not moving very noticeably when it does. Does this point to a height sensor issue? Currently saving for a gap iid as I know I will benefit from it but recently loosing my job due to the pandemic hasn't helped my saving plan ha ha. Anyone local or in Cumbria with one as I would like to recalibrate the height. Willing to pay. Many thanks for reading this long post trying to get an understanding of what is happening and how I can systematically diagnose it. Many thanks for any input given.