travolta 02

I get this erros on VCDS. Light yellow car and green are on on dashboard. I can't choose a level, everything is greyed out and car is down now.

Address 34: Ctrl. ground clearance Label: ROJ\4L0-910-553.lbl
Order module part number: 4L0 910 553 B HW: 4L0 907 553
Component and/or version: LUFTFDR.-CDC H03 7550
Soft coding: 0015520
Workshop number: WSC 31414 790 00001
VCID: 295948A380F92B07EE-807C
5 fault codes:

01583 - Leak detected in the system
000 - -
code circumstances:
Fault status: 11100000
Defect priority: 3
Defect frequency: 3
Reset counter: 132
mileage: 291077 km
Time indicator: 0
Date: 2024.03.10
time: 16:05:37

code circumstances:
fault code: 70

01770 - Temperature sensor for compressor/level regulator pump -G290-
008 - implausible signal - flashing
code circumstances:
Fault status: 00101000
Defect priority: 4
Defect frequency: 6
Reset counter: 172
mileage: 291077 km
Time indicator: 0
Date: 2024.03.10
time: 16:06:24

code circumstances:
fault code: 30

01577 - Disconnected by thermal protection
001 - upper limit exceeded - flashing
code circumstances:
Fault status: 00100001
Defect priority: 6
Defect frequency: 130
Reset counter: 172
mileage: 291077 km
Time indicator: 0
Date: 2024.03.10
time: 16:06:27

code circumstances:
fault code: 68

00446 - Function limited by: low voltage
002 - lower limit exceeded - flashing
code circumstances:
Fault status: 00100010
Defect priority: 4
Defect frequency: 1
Reset counter: 170
mileage: 291077 km
Time indicator: 0
Date: 2024.03.14
time: 13:45:58

code circumstances:
fault code: 13

01400 - Suspension level control
002 - lower limit exceeded - flashing
code circumstances:
Fault status: 00100010
Defect priority: 2
Defect frequency: 1
Reset counter: 172
mileage: 291116 km
Time indicator: 0
Date: 2024.03.17
time: 11:17:24

code circumstances:
fault code: 67

B6-3.0L

Looks like you have an air leak causing those errors. Clear those codes to reset the system and then start the vehicle to engage the ride control.

Look to see if one or more corner of the vehicle doesn’t lift. That would indicate leak(s) at or to that/those air springs.

Listen for the sound of air hissing. It could be the air spring, hose thereto, or the air control solenoid block, or a combination thereof causing the leak.

If the entire vehicle doesn’t lift, check the hose from the pump to the air control solenoid block and the block itself.

'10Q7TDI_Prestige'

Would be nice to know the year and mileage on car, yup. The main workhorse, the air compressor, is a common point of failure at plus or minus 100k miles. Your mileage may vary, of course. As prior stated, when air loss is noted you can generally observe it visually or audibly hear the air escaping if it is a big leak.

If your compressor still runs (after clearing all codes) and can build pressure, then the car will raise up as normal unless there is a leak at one of the air units at each corner of car. If it inflates/raises car, then you can do a static observation test and check it after few hours to see if a corner has dropped or the entire car is sagging, etc. It is helpful to measure at each wheel rather than simply trying to eyeball it, although if it's bad you'll definitely see it. If it's just the compressor going it'll likely drop overnight, but a bigger leak in the system could show up very quickly or over a few hours. One trick is to isolate the airbags by locking the system into tire-change mode, which locks the air release valves at each corner of car, so if the airbags and seals are all good the corner shouldn't drop at all, etc. That's just an easy way to help you rule out the air bags, seals, and air check-valves, so you know where to focus attention if you have difficulty identifying the leak source, etc.

There's a recent thread on bad compressor replacement and lots of others on here too; be sure to use the internet to search for related videos and existing threads on topic, as this is a well-hashed out topic.

Good luck...the more info you provide with an inquiry, the more you'll get help.

travolta 02

Is a Q7 from 2007, 3.0 bug. 290k km. The car is down now and chasis close to cover tires. I see just tire back left is a little upper. First time it go down the right back tire, i drove some km with the green ligth car on dashboard, then the next day the front aslso got down. The yellow and green suspension car are on dashboard. Compressor don't run at all, i tried on vcds to build pressure but it stay at 5.3bar. Even if i have a leak,why compressor not fill the other bags? There is a error on vcds that say the compressor is dead? I get just these 2 errors on compressor:
Signal line from pressure sensor for level regulator -G291-
Temperature sensor for compressor/level regulator pump -G290-

Itsbrokeagain

Your compressor prolly decided it's life was over. Need a new one plus replace the valve block for gold measure and start with that. You might have leaky bags on your struts as well.

'10Q7TDI_Prestige'

Well, usually when it's gone dead-dead, it's because the large, orange, maxifuse located next to the battery compartment has popped to protect the compressor circuit. That's just telling you it's imperative you swap the worn compressor, relay, etc., as it is overheating so badly it's popped the fuse, which could also relate to the relay failing as well. Always replace the relay when changing the compressor out; it's under the dash down by the pedals...you'll want to look that up.

It'll still be dead-dead even if you install new relay and compressor bits in there if you don't source a new fuse for it. I had that experience on ours, but the fuse is a common item and can be generically sourced at most local parts stores for a few dollars. BTW, that fuse didn't at first glance appear to be failed, as the housing/wavy design of element inside can make it difficult to discern visually that it has indeed broken the circuit.

ash.0203

where is this orange fuse located. I have error cod c126001

'10Q7TDI_Prestige'

The maxi-fuse (a comically large, orange encased fuse), is in a holder adjacent to the car's battery...so under the seat and very close to the battery box. If this fuse has 'popped', then you'll have no power to the compressor relay/compressor circuit, etc., and there should by myriad error codes listed, depending on what VAGCOM scan tool you are using to view them.

Be aware there is a very specific air-suspension calibration process to follow once you've replaced all the old, busted parts (including the maxi-fuse), where you have to manually measure at each wheel corner and then enter said values via scan tool into the control module so it can adapt the data it is receiving from the height sensors, etc., and then adjust itself for a level ride.

Good luck! Pro tip: Be sure to write down the measurement values for each corner for reference, as you may have to go through the calibration process in the scan tool a few times to get it to save the data correctly with no errors...took me few times using the VCDS VAGCOM before saved/no errors.