How do I reduce air in rear shocks of air leveling shocks

By lifting the car, the shocks extended, so the computer would have tried to deflate them while it was in the air, not inflate them. The car would be sitting too low when it was put back on the ground.

To be sitting too high, I suspect, is not the clue. The problem is it is not adjusting. That suggests a problem with the rear height sensor. I would start by looking at the link between the rear suspension and the body. If that link is broken, disconnected, or rusted apart, the sensor could be telling the computer that the car is at the correct height and no adjustment is needed. Those links typically first cause a problem right after hitting a big pot hole or from raising the car, (even to change a flat tire on the side of the road), because that causes the sensor to travel beyond its normal range. If a problem with that link occurred while the car was on a hoist, there is a really good chance the mechanic did not do anything to cause the problem. There was a problem just waiting for the right set of circumstances to occur.

Depending on what work was done, it is also possible the mechanic disconnected the link to prevent the system from performing an undesired operation while in the air, and he forgot to reconnect it. Depending on where the sensor is positioned, the system will then either try to constantly lower, or constantly raise the car, or constantly leave the car where it is.

That will eventually correct itself after drive down enough bumpy roads. That happens more commonly with front struts, but shocks are built essentially the same way, just smaller, so the same thing can happen. Once a stuck strut or shock releases, it will not cause a problem again until maybe the next time the car is raised on a hoist because they do not travel to that fully-extended position during normal driving.

They shold adjust by them selves as they have sensors in them if not like when you put a load on the car then it will have to be scanned for codes to see what is wrong. Of course that is assuming fuse and relay are ok under hood fuse box.

Check fuses both in the vehicle and under the hood. If all are good, check for power to the pump. If there is power, the pump is bad. If no power, you need to trace the wiring to check where the power is lost.

The sensors are connected to the rear lower control arms. You probably have a release valve on the pump that isn't working.

This can be a plugged drier, pinched lines or an out of adjustment height sensor. That all shold have been checked when the compressor was fixed. Also the rim module may have to be reset as well. Pic of sensor included.

Hi, on each side of your car in the rear mounted under the car there are leveling rods connected to level sensors these are malfuntioning. Some cars only have one. Sometimes they just come unhooked. This will cause them to overfill. Billymac

Hello,

it sounds like the ALC (#55) relay is stuck on here is the wiring diagrams so you can see how the system works and a guide to test the relay with the relay locations as well, below.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (Below). Please let us know what you find. We are interested to see what it is.

Cheers