how do i stop the air ride from deflating when car is parked

Don't shut it off!

You can't. Other that what the Judge said. It has a leak. Either the air suspension bladders or, if you are lucky, the small little 3/8 plastic feeder lines from the compressor. But in the meantime, do not drive away until they are fully raised or you will do further damage

hop under there armed with a squirt bottle full of diluted dish soap and start sprayin' all the parts until it starts puffin' and foamin' and you could chalk the location to find it when all the foam disappears....service this chalk mark!

agree with the other answers but I have seen some of the solenoids go bad that hold and release the pressure, or stick and not seal like there suspossed to. something to keep in mind if no leaks are found otherwise.

That's a good point kbro. If the height/load sensor(s) go faulty they could be letting it go down

hmmmm 2005....okay, yeah-equipment failure on this one- no harm in checkin' though~

....if this were the case wouldn't a "one mississippi, two mississippi" after pullin the ground lug spur a globa reset and....ta da...problem solved?

Nope. Tried that on my Lincoln before I found the leak, thought it was the height sensors. Hoping it was anyway

There's a lot better stuff than dish soap to find leaks. How about some dollar store kid's bubble soap? Plumbers use a product called "Snoop" that will bubble up like crazy with the slightest air leak. Find it in the better hardware stores. It's great for finding bead leaks on tires. --- On air ride suspensions it could be leaking from many things but it has been my experience that the 1/8" plastic lines and fittings fail first. After 4-5 years they get brittle and crack. If you find a leak, shotgun the entire thing and replace it all. -- If the compressor fails, put a Schraider valve under the bumper or in the trunk and pump it up manually when needed.

Right on TS, good option. And yeah, I meant 1/8 not 3/8

what about the vent solenoid on the compressor?

yah, used to use snoop back in the day, just dishsoap everybody has!

put 12V to it, make it run- if it will. may you have discoved the whole problem here. see if it has continuity as all motors do. could just be the bulls eye on the target!

I just spent $1000 to have both front replaced. It is supposed to lower when you park and get out. Lower makes it easier to get in vehicle. Raises when key is turned on. Like it's supposed to do.

2001 navigator air Spring exploded, the compressor came on without the key in the ignition while I was in the house. Rear height sensor had 1.26 volts registering the night before it happened. I couldn't vent the system using the scan tool earlier. I'm lost about how it came on without the key and wouldn't stop until it exploded. Any answers?