Car is straight. Rear left has just been down since the rear end rebuild/alignment. Almost like it's stuck down. They've got the car now. They disconnected battery overnight so we'll see if that did anything. They said they didn't disconnect height sensor or remove air shock, just unclipped sensor, to remove control arm.

Also I'm pretty sure my alignment report showed camber adjustment readings for front and rear, but paper is at shop with car now.

 

Just got these error messages from mechanic. He's thinking alignment guys didn't put computer into correct mode before aligning?

 

Could be they have the height sensor flipped up side down. I have seen it before when shops take them off and then flip the height sensor arm wrong when they hook them back up.

Cheers

 

I think I have the same scanner and have the same codes on mine. My air suspension fault light is on on the odometer. The car functions just fine when driving and sitting still does not leak down. I did however replace the rear air shocks. From my experience the first code means you have a slow compressor and it needs to be replaced. I have rebuilt a couple and not had good luck. New is better. Amazon has lifetime warranty Dorman compressors for $300. I have 1 on order now. You most likely have a bad shock on the drivers side causing the compressor to work harder and fail prematurely. You should replace them in pairs with Arnott. They have a lifetime warranty. You can also get that code reader on Amazon for $150 specifically for Jaguar. It's well worth it if you plan on keeping the car. Always get parts with lifetime warranties for the air suspension. Don't know if you do any of your own work but the shocks are not hard just expensive.

 

Well the bummer is everything was fine until I had the rear end rebuilt, then everything immediately went haywire. Mechanic thinks it happened at alignment. I was so distracted by the fact that the steering wheel was so far off center that I didn't notice if rear left was low taking it to alignment shop. But there were no dashboard errors then (and I think still not now, only showing up on computer.) jag is at shop now while he waits to hear back from alignment shop owner...

 

The alignment is simply mechanical. In the rear are 2 lock nuts for the tie rod ends and that is all. They are not close to the air suspension. It's possible they could have broken a height sensor but highly unlikely. However that is what it's pointing to. It would be much more likely for the repair shop to have been in close proximity to it. It is really strange you do not have a suspension error on the dash. Does the scanner say how old these codes are? I'm very interested in the outcome.

 

Replaced rear left height sensor and car is level*. All codes clear. Mechanic performed height sensor recalibration with associate that has full jaguar diagnostic computer.
*He says left and right rear height now differ by about 1/2".
I get the car tomorrow.
Note: he is discussing with alignment shop about when the sensor went bad. I notice in the PDF it says to put car in geometry mode when aligning. What happens if that shop failed to do this?

 

ok got the car back. everything is back to where it was unfortunately. no error lights, no error codes. left rear is low. left front is a little low too, but may be due to low left low.
car seems to drive fine - it is not sunk down like bad compressor or whatever.
also seems like nothing happens parked with engine running or off. measured both ways and height stays exactly the same. I seem to remember in the past, when I parked and got out of the car, after a few moments, the car would make a "PSHHHHHH" sound and settle lower. it just stays at same height all the time now. like its stuck.
he did the height recalibration with a SnapOn diagnostics tool that has all the Luxury brand software options and showed me screen shots of it prompting with instructions to go through the height calibration mode, and they had the wheel height tool and all.
everybody is flummoxed...

 

How far off is it compared to the right rear? I measure from top of wheel to bottom of wheel well and compare both sides. Also do you park on level ground? If not the car will drop down a bit on the higher elevation side.

 

Hey. Very level garage and it's been measured in multiple locations. It's off by maybe an inch. Very noticeable viewing from rear. Something weird is going on. Suspension seems stuck. Not lowering or raising.

 

Now it seems there is air pressure.
Car sat in garage a few days I got in, started and I saw the hood rise up right away.
If I start the car, get out and close the door, then open the trunk and sit in trunk, the rear left shock inflates and rises. If I stand up the rear left immediately settles low. Right rear is high and doesn't go up or down.
I had tried this last week and it seemed nothing happened.
Is the rising and lowering expected behavior?
Should they both be going up and down? Should it go up and stay up even when I get off trunk?

 

My car is exactly 1/2" low in the rear on the drivers side. It is hardly noticeable. I have not done the trunk test. My car moves the seat back and the steering wheel up when I get out and the reverse when I am in the seat. Could it be possible it lowers for the driver to more easily get in? I don't know who would know the answer to this but it's a possibility.

 

No this is new since I did the rear end arms. It's leaning to one side. Front and back. It's possible right is high and left is normal

 

I am running out of ideas. If it was mine I would trade the rear shocks from 1 side to the other to see if the problem goes to the other side. I don't know if they are exactly the same but you might also try moving the sensors side to side 1st. The shocks are about 3 hours work but not that hard to do. Did you check the sensor arm like Cdubu suggested to see if it was flipped upside down?

 

Update: so mechanic had me bring in jag and had a diagnostic specialist there. He had a laptop driven scanner with full factory jag/LR software. Went through full diagnostics and cleared all old error codes (no current suspension). Then he did height calibration. I saw the rear and front drop completely and go back up so it seems shocks and controls operate. Then he had to go through entire calibration and measuring several times. He said he could get it very close, but it would fail test at last step. After a long while he passed it (or gave up) and had me drive. Car seems great, much smoother (probably feeling new bushings for first time, and as right side is not pumped up full and stiff?)
Car is level. Checked this morning still level when engine off. Rear seemed a bit lower than front. When wife started up and put in reverse car raised and looked good. Fingers crossed...

 

So it seems your ride height calibration was corrupted after rebuilding the suspension?

 

Well, both rear height sensors were removed at that time which demands a recalibration. And one height sensor was reporting errors so it was replaced. A recal with a handheld unit was not sufficient it seems. But it's a complex and finicky system with a lot of potential failure points. I just need to get a couple more years out of the car, so hopefully nothing else major happens. I have a compressor rebuild kit sitting in the glove compartment...

 

I must have been lucky on mine. Replaced both upper and lowers. Plus dropped steel subframe to check bushings. Bolted all back up without a recalibration. Ride height was fine afterwards.
The body bushings were the only rubber that was not deteriorated on inspection.

 

did you unplug sensors? I think that's the only action that requires recalibration.

 

Damn forgot to mention one thing. I'm pretty sure mechanics tightened all rear end components (upper/lower control arms, tie rods, links, etc) while up on rack and not with car on wheels as shop manual warns. Is this a problem and will jacking it back up, loosening and then tightening back on ground resolve any introduced issues?