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It's possible you have a leak in the air suspension and the air compressor is trying to keep it aired up which is draining our battery. Disconnect the power from the air compressor for a couple of days. If your battery still goe down, then the problem is somewhere else. If you do have aleak, then the air suspension will probably be bottomed out by that time, but your battery should still be good.
It is your air ride suspension. It could be the air bags, the sensors, compressor, wires and many other things. What I did was bought an after market coil spring suspension and converted it from the air ride suspension. The air ride is lovely but costly. It is hard to diagnose that air ride suspension without spending a lot more money then you want. I suggest getting an after market converter kit, but I would make sure it has the sensor plug so that your warning light on your dash goes out....otherwise it will be on forever!
My towncar is doing the same. It actually started about 6 months ago with the fuel light, which turned out to be no problem, just some air in the line. My air bags did go out last week, so it looks like I have a low rider right now:) I'm in the process of converting from air bags to springs. I had the back airbags replaced but then the dang compressor went out and I don't have the money to replace that. The check air suspension light will stay on right before you have to replace the airbags. Turn your car off then on and if it takes a little while for the light to come back on you have a few weeks to go before it goes out completely. Oh and it is a real easy fix. Its gonna cost about 200 bucks for each airbag, but if you convert it to spring it will cost about 150 in parts.
those lights are on to let you know that there is a problem with the system. if they are on their main options will be off, just like if your airbags light is on the airbags wont work if there is a crash, so take ur car to your mechanic and have it ckecked, there are lots of testing to be done on your car to determine what needs to be done
The air suspension uses the same vent solenoid to vent front so that will be ok. The problem will either be the rear height sensor which mounts on/near left side of rear axle. Or the air suspension module itself.
I would suspect it is the rear height sensor,the link may have come unhooked or it may be sticking or just bad.
It could be a wheel speed sensor that went out or something... When working with the wiring, something could have just gotten crossed or tapped to get these codes as well. The compressor shouldnt be running anymore if everything was tied off properly. Take it in somewhere and have the codes cleared and that should fix the problem hopefully. I know AutoZone has a reader, but I do not know if they have they ability to clear the codes.
I hope this helps.