It is the air suspension valve solenoid that often gets bound up due to the moisture in the lines. Sometimes corrosion and/or debris will bind the solenoid. You can give it the old love tap and also try to blow out the lines to work loose. I would attempt this first but if that doesn't correct the situation, then a new unit is in order...

https://www.fcpeuro.com/products/audi-air-suspension-solenoid-valve-unit-arnott-industries-vb-3824#fitment

 

Surprised these cars don't have a water trap that is part of regular maintenance to drain. Or a drain for the tanks.
I built my own air suspension and did a better job than Volvo.

 

My car is Volvo xc90 t8 2017, can anyone Get a picture of where it is becous i dont know where it is.

 

right in the center rear of the car near the ERAD. you can see the six air lines running from it pretty easy if you scoot under the car and take a look. #20 in the parts pic below

 

Thank you so much for helping me. ( travismail1 ) ( drtommi )

 

The dtc you have posted i believe is for the solenoid in the RR shock assembly.

 

Youre right the solenoid my problem is like its problem but is there someone who country help me to fix it and maybe a photo to show me where and what to fix and it might be eletrical failur

 

volvo xc90 t8 2017
Suspension Service required
The problem was actually from the wire from the tire and the wire had no power then and here is the picture for people that have the same problem and need help and it is 7 steps where it starts and where it ends.

 

Do you feel its was a rodent or a chafing problem? I've also seen wires snap in half within door harness boots from movement over time.

 

The wire was rotting and it snapped in half

 

The wire must flex with the suspension travel and finally broke. Great find BTW.

 

I was looking for Diagrama Eléctrico Volvo but I never found it and I did look for a very long time. I thought about how to fix it and where to look through eBay and where the lines went. If there is someone that has it please send us a pdf of it so we can look and fix it as well.
I found the lines on eBay and this are the pictures.

 

Has your erad motor or trans been replaced. I seen a lot of people not install new clips on wiring on the control arms and knuckle causing wires to be lose or rattle

 

No I have not replaced it, it was just the wire that has rotten