czred1 Posted January 7, 2018 Share Posted January 7, 2018 Happy new year everyone. My 2002 L322 4.4 V8 is becoming a bit of a pain now. Went for my Mot passed no bother, on the way home air suspension inactive appeared hold button illuminated. Used all coms to read faults and got "reservoir pressure static when filling" I've fitted brand new; Compressor Relay A reservoir pressure sensor But still the same fault, compressor seems to keep trying to fill tank only way to stop is to remove compressor relay. Does anyone have any thoughts?? Other than a match Lol Could be something I'm missing. Quote Link to comment Share on other sites More sharing options...
miggit Posted January 11, 2018 Share Posted January 11, 2018 What voltage is your battery running at?..... I know it sounds daft, but a lot of faults can be caused by low voltage! There is also a known fault with the front valve block on the reservoir, can't remember exactly, but I think one of the solenoid valves sticks open and causes the pressure to stay flat, and then you get the static pressure message! And are you clearing the faults everytime? I have seen it suggested that a total system reset can help, that's a disconnect the battery, both leads, and touch them together for 10 minutes... this apparently discharges the system totally. On reconnection you'll need to do full lock on the steering to opposite full lock and back again! (truth be know it's only left to right, or right to left.. but I can never remember, so I just go full lock one to the other and back again!!) This will turn off all the lights on the dash and clear all fault messages. Quote Link to comment Share on other sites More sharing options...
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