Question about 2004 Land Rover Range Rover

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After changind lower control arm, "air suspension inactive" came on computer on 2004 ranger rover.

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  • chefacosta Aug 05, 2010

    yes very helpfull



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Suspension Freezing at Normal Height (Warning Light on and "Suspension Inactive" Message)

Cause 1: Sticking Pressure Switch
after changind lower control arm, - 5f610fb.gif
The pressure switch (ANR3902) is subject to intermittent sticking, producing a false Testbook diagnosis of "inlet solenoid valve sticking". Replacement is s simple matter of unscrewing the old one from the valve block and putting the new one in with some Loktite (see diagram at right from Technical Service Bulletin). Even if you don't have a Testbook, shotgunning the problem by replacing this valve would be worthwhile and will very likely restore normal operation.

To prevent this problem, it might help to drain the air reservoir at least once a year so to minimize air valve corrosion. Stefan Joer of Germany reported that his 2002 build date RRIII, he received the dreaded "Air Suspension (Niveau System in German) Inactive" message and the dealer was unable to find the problem. So he got the workshop manual and traced the cause to the valve block. He reports "There are four airvalves, and inside these airvalves there is one small valve, which is operated by the outer solenoid. I took one apart and all what I could see was a lot of corrosion on the small inner valve, caused by the moisture/water of the compressed air. It is very important that you drain your air reservoir one time a year and that you check the drier of the EAS system. If the valve block or air reservoir needs replacing, unfortunately you get the valveblock only with the airreservoir at about 700 Euros!"

Cause 2: Compressor Overheat Signal
If the ECU thinks the compressor is overheating it will freeze height changes and display "Suspension Inactive". It will also store the code storing code 41 "Compressor Temperature Rises when Static". On 2003 and 2004 models up to VIN 4A155162 this can sometimes be overcome by updating the air suspension ECU software. The later software accepts higher readings from the compressor temperature sensor. Otherwise, the problem might be a faulty compressor or temperature sensor, or possibly a leak in the system causing the compressor to be on constantly.

Cause 3: Frozen Pressure Relief Valve
I think this is another possible cause of the "suspension inactive" signal. If the vehicle is already at standard height on a cold morning, it may be fine for driving but if you try to request a height change it will not respond (and might give the "Air Suspension Inactive" message until the pressure relief valve has thawed out. See "Failure to reach normal ride height" below.

Keep in mind that the Air Suspension Inactive usually means there is a problem with the Air Suspension. However, it will also come up when alternator or battery voltage is low, or when you reset (disconnect and then connect) the battery.

To reset it manually while in Park (P), turn steering wheel all the way left, hold few seconds, and then all the way right, hold few seconds. All the warning lights will go out. Most common failure is the passenger front air strut, since batteries are prone to leaking acid, it leaks right on top of the rubber airbag and burns through it.

Dealer willcharge you one hour to diagnose, or you can easily diagnose this by looking at the ride height of each particular corner of the truck. If its sits low, or emits hissing sound when you park the truck, its leaking. If you keep driving with leaky air strut, you risk burning up the air compressor, as its working extra hard to compensate for the leak.

Hope helps.

Posted on Aug 05, 2010


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  • Thread air suspension inactive

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    Feb 14, 2012 | 2004 Land Rover Range Rover

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    My 2003 range rover is reading air suspension inactive and it will not go

    Try using a scanner to read codes or re-activate, also have a look at the air suspensions bag/balloons, might have a leaky one. If so change, check air suspensions activator unit too. Valves may ber bad.

    Sep 10, 2011 | 2004 Land Rover Range Rover

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    Am receiving a message on my Range Rover 2004 Inactive suspension

    Welcome to Fixya

    Air suspension is currently in fault mode. It will have to be re-set by someone who has the Land Rover scantool (either a dealer or an independent shop). The EAS system is inaccessible with a regular OBDII scantool. The car will not allow you to control the suspension height (raise/lower/defeat) until the fault is cleared. Please see this link .

    Thank you for using Fixya!

    If you need further help, reach me via phone at

    Apr 07, 2011 | 2004 Land Rover Range Rover

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    Probably the ride height sensor has failed or come unplugged, Crawl under the right side and check it is still connected, if so undo the arm connecting it to the lower suspension arm. Now get someone to start the car whilst you manually move the sensor arm up and down. If nothing happens to the ride height the sensor is gone,or the wiring is damaged or something, and will need to be replaced

    Sep 26, 2010 | 2004 Land Rover Range Rover

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    After changing lower front control arm, on board computer says. air suspension inactive. what could have cased that, please help. 2004 range rover

    try disconnecting the battery and then join the battery cables together and leave overnight and see if clears the fault

    Jul 28, 2010 | 2004 Land Rover Range Rover

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    Feb 25, 2010 | 2004 Land Rover Range Rover

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    2004 Range rover front right suspension air leak

    good chance broken line going to that cylinder. it is still pushing air but just not making it all the way there look at the bleeder valve or the fill valve get spray bottle with soapy water spray suspension in the area of the valve look for bubbles.

    Sep 02, 2009 | 2004 Land Rover Range Rover

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    Air suspension inactive

    I wouldnt change it over to coil spring, not that model. You may not be happy with the results. check out my rover website,

    May 27, 2009 | 2004 Land Rover Range Rover

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