Hi, got in the car today, started the engine and suspension fault came up on the dash ! The 4 x 4 screen shows the rear right wheel ( behind the driver ) with a red dash underneath it. I have attached a photo to show the screen, I connected the IID and got the following fault codes

C1A06-1C (AF) Rear right height sensor - General electrical failure - circuit voltage out of range.

U0421-68 (2B) Invalid data received from ride level control module - Algorithm based failure - event information

I cleared the faults and as they were clearing the rear right wheel on the 4x4 screen went up and then back down along with the suspension fault message reappearing.

Now the car is struggling to raise, any ideas anyone. I'm thinking leak somewhere or a dodgy sensor. The car was raising and lowering as normal when the fault first came up but a few hours later seems to struggle.

Click image to enlarge

I reckon sensor or it’s wiring feed. Maybe whip off the wheel and take a gander Gone to a good home: 2011 4.4 TDV8 Vogue SE Buckingham Blue with Ivory and clear glass = "Rory"
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As above, sounds like a height sensor has gone duff or possibly the connector or loom has corroded out. the other possibility if you've been playing is that the sensor has inverted on its arm so its 180deg out of position. which would give a very dodgy reading. There is nothing that can't be fixed with a hammer😜😜
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Thanks for the replies much appreciated, I’ve left the car on the drive this evening and when I’ve just went out to check it the car has lowered and looks like it’s in access mode. Would a dodgy or disconnected sensor cause it to do that ?

A leaking airbag? John
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If one air bag was leaking ie the rear right one, would the whole car lower or not just that corner. Checked the car this morning and it looks like the whole car is on the bump stops.

Took the wheel off this morning, cleaned up the height sensor and sprayed with penetrating fluid. Car now rises and lowers as it should but still dropping to the bump stops when left for about 30 minutes !

Check the live values. I had a dodgy sensor back right, changed it but had to alter the value with iid tool to level it back up after fitting.

Hi Lad, thanks for the info. Was your car lowering due to the defected sensor ? Mine seems fine when the engine is running but definitely dropping to bump stops over night. As soon as I start the car the next day it rises automatically to normal height.

Yes it was dropping over night that’s what got my attention. But just on that corner. I usually lower the suspension when I park it up on the drive. I replaced the sensor but it was still slightly lower at that corner but showing no faults, so I altered the values to level it up with the iid tool.

Thanks for the replay Lad, I’m wondering if I have another issue as my car is lowering on all four corners. I think the rear right sensor is definitely broke as the dash 4x4 screen shows that wheel lower than the others even when the whole car is raised and pretty level.

I’m in the Lake District at the moment so will have a check on the live values when I get home tomorrow, will probably order the new height sensor tomorrow.

Sometimes one faulty sensor can do this, the fatty will wake up and try to level itself every few hours, it gets the wrong info from one sensor and tries to lower the others to get it to where it thinks is level...

Just change the sensor and I bet it's OK..  Pete

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Thanks for that Pete, plan is to change the sensor and calibrate the system and hopefully that will cure the issue.

Finally got round to changing the defective sensor, what a pain removing the two torx bolts ! Very poor design and would have been much easier to do if they were standard bolt head. Sensor now on and suspension calibrated, nice to see the car sit nice and level.