I am seeing 3 issues that might or might not be related and, I wonder if others experienced similiar issues:
1. Occasionally, the car's right front (suspension) had lowered itself over night. It almost seems it happens more often when the temperature drops more than usual over night. I saw some posts about leaking airbags but I would expect them to leak constantly instead of occasionally...
2. Every once in a while(1 in 20 trips?), there is a hicup when I try to accelerate. It goes away once I briefly step off the pedal.
3. Every once in a while, three warning lights come on at the same time: the yellow one that indicates the suspension is in jack mode, the red ABS light and another one that I don't remember right now(sorry if I can't be more specific but it hasn't happened for a while).

Does anything of that sound familiar? I was told that it all might be related by air bubbles that come from a leaking air compressor...

Thank you for your help!

 

I had a leak at one of the modulators at the black box which feeds air to the springs. Change in temp really affected how quickly the wheel dropped. Generally, a big change in temp will cause all 4 of mine to drop a little over night and I'm thinking it's due to expansion and contraction of the air bag.
I had a similar issue with the ABS light and another indicater going off which turned out to be clogged sensors due to dirt and grime build up. I cleaned the under carriage and it went away.

Can you describe the "hiccup" a litte more? Is it a hiccup in the suspension or the acceleration?

 

I dont think the leaky bag has anything to do with the cold weather. The bag if it is a small leak will leak really bad on level 1, but if you put it in level 2 the leaking is almost non existent,same with level three. Spray soapy water on the bag and saturate it all around. As it goes from level 2 to level 1 feel all around the bag for leaks. you may need a new bag.

i dont know what year you have but i have an 02 and the compressor light came on when my bag started leaking really bad it was hard for the car to get to level 2 but once i got there it didnt leak, but put it in level 1 and somtimes the compressor just stopped running because it worked to hard, and the yellow light stayed on. I never had all three lights come on at the same time though?

was your car ever in an accident and the airbags deployed?

 

1)Air bags may be going bad
2)maybe coil pacs going bad
3)brake light switch

 

I just got the car back from the independent shop after it was there for more than 3 weeks. Ouch! According to them, they said the found the cause for the three indicator lights coming on to be a malfunction in the brake light switch as "MYD WGN" suggested in his post. I haven't driven the car long enough to determine if the issue is gone but so far so good.

Thanks for all the help. Highly appreciated!

Jens
2001 allroad