Hi folks,

I'm hoping that someone can help me please. Approximately 5 months ago, I replaced the front air struts on my 05 Bentley Continental GT with Aerosus struts.

Almost every time I drive the car, I get the error message "Level Fault Workshop". Sometimes it comes on within a few minutes but mostly, it takes up to an hour to appear. I notice that the front end seems to get stuck on High level mode and doesn't want to drop. The rear seems to be at normal height.

The error message clears on restarting the car but the suspension does not return to normal level, except for e.g. overnight. The suspension does not drop below normal level, so I don't think I have a leaky air strut. Putting the car in Jack Mode doesn't allow the front end to return to normal level either.

​​​​​​I brought the car to my trusted local non-Bentley service agent who plugged in the car to diagnose but it was inconclusive. He said it could be compressor overheating but couldn't say for sure? He suggested that I wait until the part fails and then replace?

Has anyone else experienced this problem or does anyone have a probable root cause?

Could it be a faulty compressor, bad battery (I keep the battery on constant trickle charge)? Does the suspension need to be calibrated after changing the air struts?

Any suggestions would be greatly appreciated,

Kind regards,

JFIRL

 

Certainly calibrating the suspension height couldn't hurt.

When your indy service agent ran the diagnosis of the suspension, were the height level results in the normal range? As I recall it's supposed to be 395cm front and 394cm rear.

Also: Have you checked that the linkages are attached to the height sensors? And that the sensors are attached to the frame?

Also: It seems odd that you park the vehicle with the front shocks at max height extension and it returns to "normal" sitting... without an air leak.

I'd say apparently your compressor's likely fine, but "could be overheating" if it's basically "running continuously till it overheats" possibly because the computer tells it to keep running, possibly because it thinks the height is low, possibly due to a sensor issue. I suspect you have a sensor issue. Running the VCDS height calibration should sort-out what's up with that for you. Oh yea, and I'll add cause I just remembered: If you can't or don't follow-through on inputting position #5 in VCDS, the calibration values won't "take" and nothing will change... it stays at (or reverts to) whatever it was before you started the calibration. Also (as I learned) position #1 is LF, position #2 is RF, position #3 is LR, and position #4 is RR... and it will really mess you up if you swap #3 and #4 or similar.

In my experience, the compressor will shut-down due to overheating in "about a minute or two" of running.

 

Thanks very much for sharing your expertise and advice, I greatly appreciate it! I'll be visiting my indy service agent over the coming weeks for a service and will ask him to do the calibration and sensor checks.

Thanks once again 👍

 

Hi folks,

After multiple visits to multiple service agents and a lot of money spent on associated labour, I have finally been able to resolve my "Level Fault Workshop" problem and wanted to feed back to the community so that it may be of help to someone else down the line.

1.The solenoid block valve was replaced although this was not the root cause.
2. A level calibration was performed.
3. Residual Pressure Holding Valves on front struts were found to be damaged. Once replaced, the problem was solved.

I sourced the parts from Aerosus and as usual, they were more than helpful.

Kind regards,

JFIRL

 

Hi Bud

just out of curiosity in terms of the issue I have the same issue how much damage to the Wallet did it end up doing and where would you say is best to start when looking to get it fixed ?
thanks

 

Hi Rjr,

I would start by getting your local independent service agent to assess the Residual Pressure Holding Valves on each strut and replacing if necessary (Aerosus supply). Check lines between compressor and struts for leaks, check each strut for leaks. Finally check compressor.

Best of luck!
Kind regards,

JFIRL

 

Can you remember how he diagnosed and checked the valves.
is it something you can hear leaking?
Thanks
Frank.

 

Hi Frank,

Unfortunately I don't know how he diagnosed the issue but it's a relatively common root cause of air suspension faults for various brands of vehicle.

Best regards,

JFIRL

 

[QUOTE=JFIRL;4934054]Hi Frank,

Unfortunately I don't know how he diagnosed the issue but it's a relatively common root cause of air suspension faults for various brands of vehicle.

Best regards,

JFIRL[/QUOTE
HI JFIRL,
Thanks for the reply. Is there any chance next time you chat with your mechanic you could ask him and post his answer. It would be good info to catalogue on 6speed.
🙂
Frank.

 

Hi. I have a 2004 bentley gt. It started as a fault on the naf staying bigh all the time. Spent hours checking the wiring etc all ok.,
Got a autel diag tool and reac all codes. No codes stored in memory
​​​​​​Changed valve block on rear suspension and tested 😢 still faulty 🤔😟

Changed front height sensor on nsf and osf.
Both old sensors on parameters working ok and changing when moving.
The car now sits high on front and will not go down when changing to normal ride height
Changed residual valvea on front struts and fault still there.

Went on forum and read about coding vehicle height

Original height front is 445 mm and rear is 400mm

Go to level ecu
Security code is 31564

Go back to adaption
Enter 001 and follow screen wait for input as car will move up and down approx 1 min, measure from central of alloy badge to wing and input the measurements exactly aa they are
Repeat on number 2 , 3., 4 and go to channel 5 and input number 1 on code and save all information
If you don't complete ALL codes it will store a fault learning code and wlll not clear until all completed fully, Might take a couple of attempts
Be patient

Car sits at 396mm front and 394 rear
Looks fab and goes up and down on suspension adaption inside car and drops to normal height

Hope this helps all