tt1234

I have Audi A8L 2008 recently it started giving air suspension yellow signal.
With one of the member suggestion I bought OBDEleven Pro and ran scan. I am listing all the fault codes found.
Any help on diagnose my problem is greatly appreciated.

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34 Ride Control System
System description: LUFTFDR.-CDC H07
Software number: 4E0910553L
Software version: 6340
Hardware number: 4E0907553H
Coding: 0015510
Trouble codes:
01772 - Sig. wire from level ctrl pressure sensor Implausible signal
Intermittent
Priority: 3
Frequency counter: 64
Driving cycle: 188
Mileage: 196964 km
Date: 2017-07-15 01:54:38
01577 - Switch-off due to excessive temperature Upper limit exceeded
Intermittent
01398 - Signal wiring from central locking - doors open No signal/communication
Intermittent
01598 - Drive battery voltage Lower limit not reached
Intermittent
Priority: 4
Frequency counter: 7
Driving cycle: 188
Mileage: 202281 km
Date: 2018-07-26 18:45:48
01583 - Leak detected in system
static
Priority: 3
Frequency counter: 12
Driving cycle: 148
Mileage: 202468 km
Date: 2018-10-28 02:33:10
01400 - Level control system Lower limit not reached
static
Priority: 2
Frequency counter: 13
Driving cycle: 148
Mileage: 202483 km
Date: 2018-11-20 08:19:21
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61 Battery Regulation
System description: J0644 BEM H12
Software number: 4E0910181C
Software version: 0550
Hardware number: 4E0915181C
Hardware version: 000
Serial number: 00000000013034
Subsystems:
System description: von VA0 3305066018
Software number: 4E0915105A
Long coding: 344530393135313035412056413033333035303636303138
Trouble codes:
02277 - Static current stage 6
Intermittent
02272 - Static current stage 1
Intermittent
02274 - Static current stage 3
Intermittent
02273 - Static current stage 2
Intermittent
02276 - Static current stage 5
Intermittent
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01 Engine
System description: 4.2l V8/4V
Software number: 4E1910560D
Software version: 0010
Hardware number: 4E1907560
Serial number: AUX3Z0G7529092
Long coding: 01060009190F0120
Trouble codes:
P1577 - Right Electro-Hydraulic Engine Mount Solenoid Valve Open circuit No signal/communication
static
P1573 - Left Electro-Hydraulic Engine Mount Solenoid Valve Open circuit No signal/communication
static
P1653 - Read DTC memory of ABS CM Implausible signal
static
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03 Brakes
System description: ESP 5.7 allrad H49
Software number: 4E0910517J
Software version: 0540
Hardware number: 4E0614517BQ
Coding: 0007597
Trouble codes:
01826 - Steering angle sensor, voltage supply terminal 30
static
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05 Kessy
System description: FBS AUDID3 H12
Software number: 4E0910131
Software version: 0200
Hardware number: 4E0907181B
Serial number: AUX3Z0G7529092
Coding: 0263168
Subsystems:
System description: ELV
Software number: XXXXXXXXXXX
Software version: XXXX
Trouble codes:
00668 - Vehicle voltage terminal 30 Lower limit not reached
Intermittent
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07 Display Control Unit
System description: Interfacebox H43
Software number: 4E0910732B
Software version: 4140
Hardware number: 4E0035729
Serial number: 346HL077543002
Coding: 0000003
Subsystems:
System description: E0380 BedienteilH01
Software number: 4E0910611
Software version: 0050
Trouble codes:
00446 - Function limitation due to insufficient voltage Lower limit not reached
Intermittent
---------------------------------------------------------------
08 Air Conditioning
System description: KLIMAAUTOMAT 017
Software number: 4E0910043B
Software version: 0450
Hardware number: 4E0820043H
Serial number: 00000000132132
Coding: 0102801
Subsystems:
System description: Sitzluefter FS H02
Software number: 4E0910772A
Software version: 010
System description: Sitzluefter BFS H02
Software number: 4E0910772A
Software version: 010
Trouble codes:
00065 - Left rear footwell heater Electrical malfunction in circuit
static
00066 - Right rear footwell heater Electrical malfunction in circuit
Intermittent
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09 Central Electrics
System description: ILM Fahrer H16
Software number: 4E0910279S
Software version: 0240
Hardware number: 4E0907279S
Coding: 0143123
Subsystems:
System description: Wischer WWS D3 H60
Software number: 4E1910113C
Software version: 0420
Coding: 0000036
System description: REGENLICHTSENSORH04
Software number: 8K0910557
Software version: 0002
Coding: 0139548
Trouble codes:
00908 - Wiper motor control module Lower limit not reached
Intermittent
01520 - Rain/light recognition sensor Lower limit not reached
Intermittent
00908 - Wiper motor control module No signal/communication
Intermittent
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0F Radio Tuner Digital
System description: SDAR SIRIUS H07
Software number: 4E0910593K
Software version: 0140
Hardware number: 4E0035593F
Serial number: AUZ4Z7G0161344
Coding: 0000100
Trouble codes:
02635 - Tuner not enabled/activated
static
---------------------------------------------------------------
1E Media Player Position 2
System description: MP3-Changer H46
Software number: 4E0910110C
Software version: 0350
Hardware number: 4E0035110A
Hardware version: 000
Serial number: AUZ5ZBG3493204
Trouble codes:
00446 - Function limitation due to insufficient voltage Lower limit not reached
Intermittent
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36 Seat Adjustment Driver Side
System description: Sitzmemory FS H02
Software number: 4E0910760D
Software version: 0010
Hardware number: 4E0959760B
Serial number: 5DS 008 795-03
Coding: 4071650
Trouble codes:
01877 - Belt height adjust. motor button, down mechanical malfunction
Intermittent
01876 - Belt height adjust. motor button, up mechanical malfunction
Intermittent
01481 - Head restraint adjustment switch, down mechanical malfunction
Intermittent
01480 - Head restraint adjustment switch, up mechanical malfunction
Intermittent
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37 Navigation
System description: MNS US H50
Software number: 4E0910888F
Software version: 0990
Hardware number: 4E0919887M
Serial number: 395I 077504575
Trouble codes:
00446 - Function limitation due to insufficient voltage Lower limit not reached
Intermittent
02927 - DVD read error
Intermittent
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38 Roof Electronic Control Module
System description: Dachknoten D3 H05
Software number: 4E0910135A
Software version: 0090
Hardware number: 4E0907135
Serial number: 00000722900063
Coding: 0003463
Trouble codes:
00410 - Pre-selection signal for opening sunroof Short circuit to ground
Intermittent
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46 Central Module Comfort System
System description: Komfortgeraet H10
Software number: 4E0910289E
Software version: 0010
Hardware number: 4E0907289E
Serial number: W040710050086
Coding: 0048142
Trouble codes:
02741 - Right brake/tail lamp bulb 2 No signal/communication
Intermittent
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52 Door Electronics Passenger Side
System description: Türsteuer.BF BRM005
Software number: 4E1910802B
Software version: 0180
Hardware number: 4E1959802F
Coding: 0032364
Trouble codes:
02111 - Motor for window regulator Lower limit not reached
Intermittent
00532 - Supply voltage Lower limit not reached
Intermittent
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55 Headlight Regulation
System description: AFS 1 H01
Software number: 4F0910357F
Software version: 0020
Hardware number: 4F0907357F
Coding: 0000018
Subsystems:
System description: AFS-Modul links H01
Software number: 4F0941329D
Software version: 0010
System description: AFS-Modul rechtsH01
Software number: 4F0941329D
Software version: 0010
Trouble codes:
00446 - Function limitation due to insufficient voltage Lower limit not reached
Intermittent
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56 Radio
System description: TUNER EU/US/RDW H42
Software number: 4E0910541Q
Software version: 0620
Hardware number: 4E0035541S
Serial number: 396J/077580418
Coding: 0000002
Trouble codes:
00532 - Supply voltage Lower limit not reached
Intermittent
00446 - Function limitation due to insufficient voltage Lower limit not reached
Intermittent

Jack88

That many codes make me think of a bad battery, clear all the codes and see what comes back. But not the suspension, I suspect a leak in the system. You have a pump that's overheated, likely from trying to keep up with a leak, and even VCDS says a leak in the system. Do a search on here, there are hundreds of threads on the subject. Diagnosis from this point is best done with other techniques.

tt1234

Jack88

You have to clear all the codes, and see what comes back, they don't clear themselves. However, the suspension codes won't be from a bad battery. You need to do other forms of diagnosis. The most common failure for the suspension codes you have is a leaking strut, and it's easy to diagnose. You do not want to drive the car that way, because you will quickly burn out the compressor permanently and cost yourself quite a bit more money, so don't drive it until you know what it is and have the chance to fix it.

tt1234

I bought a new battery and installed it myself. However , I tried to connect my other car battery as standby to audi using jumper cable, but it doesn't seem to recognize it so I disconnected it and replaced my audi battery, EverStart-Platinum-AGM-Battery-Group-h8 , saw some youtube and one of the guys used this so bought .

After installing the battery I reset all the codes and ran the scan again. Seems like most of the battery related codes seems to be have gone. While running the scan I kept car in jack mode to avoid use of battery and stop the compressor. Here are the codes I got but Ride Control Codes have gone. In order to get the suspension related codes do I need to drive the car> As you mentioned I don't want to drive the car and do more damage.

34 Ride Control System
System description: LUFTFDR.-CDC H07
Software number: 4E0910553L
Software version: 6340
Hardware number: 4E0907553H
Coding: 0015510
Trouble codes:
No trouble codes found

01 Engine
System description: 4.2l V8/4V
Software number: 4E1910560D
Software version: 0010
Hardware number: 4E1907560
Serial number: AUX3Z0G7529092
Long coding: 01060009190F0120
Trouble codes:
P1653 - Read DTC memory of ABS CM Implausible signal
static
__________________________________________________ ___________________
03 Brakes
System description: ESP 5.7 allrad H49
Software number: 4E0910517J
Software version: 0540
Hardware number: 4E0614517BQ
Coding: 0007597
Trouble codes:
01826 - Steering angle sensor, voltage supply terminal 30
static
__________________________________________________ ______________________
08 Air Conditioning
System description: KLIMAAUTOMAT 017
Software number: 4E0910043B
Software version: 0450
Hardware number: 4E0820043H
Serial number: 00000000132132
Coding: 0102801
Subsystems:
System description: Sitzluefter FS H02
Software number: 4E0910772A
Software version: 010
System description: Sitzluefter BFS H02
Software number: 4E0910772A
Software version: 010
Trouble codes:
00065 - Left rear footwell heater Electrical malfunction in circuit
static

Jack88

Yes, driving the car or at least taking it out of jack mode would be required to get the car to bring the codes back. However, that's not necessary. Leave the car at full height in jack mode and let the car sit overnight. If any of it drops, you have a leak, and if one corner drops more than the rest, the problem is in that corner, most likely a strut.

tt1234

Thank you

tt1234

I just started car and moved it back and forth and I hear compressor shut off.Vehicle raised to normal level. Then I ran the scan here is what I get.

34 Ride Control System
Trouble codes:
01400 - Level control system Lower limit not reached
Intermittent

I put it n jack mode and letting it sit will check in 30 minutes and see if one side goes off down quicker than other and let you know..
Do you think any issue with level sensors?

tt1234

As you suggested left car in jack mode for 30 minutes, passenger side is flat and driver side is still up I could put one finger around fender freely.

This is driver side rear, when full height I could freely put my 2 fingers around the fender. After 30 minutes sitting in jack mode, I could only put one finger freely.

This is passenger side rear, when full height I could freely put my 2 fingers around the fender. After 30 minutes sitting in jack mode, I could not put one finger also it s flat.

Jack88

So the issue seems to be isolated to that corner. It may be a failed strut, or as has recently been an issue for another member, there is a valve between the fitting for the strut and the airline that can fail. It's called the residual pressure holding valve, shown below, and it is interchangeable between both sides of the car. I suggest taking the one from the driver's side rear and passenger side rear and swapping them, to see if the problem follows the part or stays with the strut. They are a bit tricky to get off because they lack anything to grab onto, but it should come off with pliers. You can see where it is on the black cylinder on the second photo below.

On a different note, that tire has chunks missing from it, you are at high risk for a sudden blow out, that looks dangerous. They tend to go at high speed, you should get that handled as soon as possible and try not to hit any more curbs(or whatever was run over to do that) at speed.