Now that my lamda fault seems to be corrected it appears that my RR still wants to haunt me. I have inner tie rod ends to replace this week. Easy stuff. I've been seeing random HDC inactive without codes, occasional radial motor faults, air suspension inactive with the following codes in various combinations:
DSM-Driver Seat

0x11 Steering column radial motor - transmission error

EAS-Suspension

0x6F Compressor temperature rises when compressor inactive

0x8 High Pressure Exhaust Valve Fault

0x18 High Pressure Exhaust Valve Supply Fault

EAS-Suspension

0x24 Compressor Temperature Sensor Fault

0x6F Compressor temperature rises when compressor inactive

LCM-Light Control v11

0xC ECU EEPROM fault

0x57 Air suspension active/inactive

0x0094 Unknown

0x0095 Unknown

Last edited by doclees on 27th Feb 2018 7:14pm. Edited 1 time in total

Random HDC Inactive usually points to battery?

Compressor faults sound like an exhaust problem - could be blocked try removing the exhaust cone, or drill a hole in it?

Or all related to battery...../....alternator ? .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

Thanks I will check. Couple weeks ago at shop to find the front end clunk they did a general check and check sheet said battery was showing age and should consider replacement soon. I thought that was because it had gone weak from sitting while sorted the misfire. Figured they are just trying to sell me a battery.

Opened up the spare tire well to check pressure valve to find about 1/2 inch of water. The valve was half submerged and the water was around the base of the pump. I'm assuming at this time this is causing the problem. This is a new water leak. Wasn't there last year. I know there a couple of places the water gets it. It is not in the side wells and just in the tire well. The lift gate gaskets was not wet. The the lift gate to tailgate was dry. The lip of the tire well cover was wet. The metal lip edge under it was wet. Does this point to the entrance?

I'm getting the feeling there has been more Jerry-rigging back here. Compressor was dry but this valve does not look like the one in the RAVE. I'm assuming the cylinder on the end of the T valve is the exhaust valve. If it gets wet should it be replaced or just dried out.

That is the PRV - pressure relief valve. I would just take it off and dry it, give a good clean. It is not the type you drill a hole in. In fact it can be removed altogether: http://www.fullfatrr.com/forum/post268013.html#268013

Water ingress either LH or RH rear quarter light glass, upper boot lid seal or somewhere around the bumper mountings.

I seemed to have solved my boot area filling up with water by reversing the grommet under the spare wheel, and cutting a couple of holes in it! - or the leak fixed itself (rusted over probably )

 .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

Thanks. Funny that the RAVE shows the plastic one for the connector. It also says the system doesn't need to be depressurized to disconnect this union. Do you agree? I could just find a threaded plug for this connector.
The RAVE also says the pump should be bolted to the body. No apparent bolt holes to bolt to.
I forgot to mention that when the system was working "normal" I was hearing a tone from the back area when lowering or raising. Not real loud but noticeable. Don't recall hearing it in the past.

All dried out and back together. Got about 30 miles and no suspension fault. Still saw HDC warning on start up. Now to find where the leak is getting in.