Member Since: 23 Jul 2021
Location: Gloucestershire
Posts: 8
Persistent air suspension failure
Hello list, my Disco 3 had an amber suspension warning light on it so went to the garage, an independent but does loads of Landrovers. He couldn't find a fault so suggested I carried on until the fault came obvious. Inevitably, the red warning light came on, the car sank to its knees and limped me home.
On and off and the one year old compressor pumped it all back up, slowly, and it stayed up for night slowly sinking. They had it back for two weeks and couldn't find an obvious leak but changed the air tank which was corroded and showing bubbles when sprayed with soap. Also changed the front right height sensor. They swear they couldn't get it to repeat the red light fault but it was low when I picked it up but rapidly rose and looked ok.
5 mins into my journey home, red light, 30mph max and low again. Got it home and re-inflated the thing, which was quick with the new air tank and it sat on my drive for two weeks without going low, then started to at the rear slowly. Inflated again and up all week with no sign of dropping and no warning lights. Drove it back to the garage for them to have another go and 2 mins in, red light, 30 mph and flat.
Read codes on my cheap reader and got U0421, C1A73 (which is the same sensor).
So it collapses only when I'm moving, and straight down like a brick all over, not gently or slowly.
Doesn't make sense to me that it's a bag leak, as to empty so quickly, surely it would not hold air ever?
Sorry for the long ramble, but I figured detail would be helpful. Any thoughts appreciated as I am slightly at wits end.
Click image to enlarge
All the best, Chris.
24th Mar 2024 6:49 pm
1784
Member Since: 04 Sep 2009
Location: Almunge
Posts: 170
It sounds like it's getting a faulty value and the ECU decides it's best to deflate all air. I would look at the relevant sensor wiring, check that the correct part was fitted and perhaps a suspension calibration as first steps.Defender 110 SE 2021, Tasman Blue
Discovery 1 V8 ES 1997, Epsom green
Discovery 3 V8 HSE 2006, Bonatti Grey
Range Rover V8 1983, Sierra Silver
24th Mar 2024 9:00 pm
von Horst
Member Since: 27 Dec 2022
Location: aneby
Posts: 127
Yes the all familiar air suspension problems! wouldnt it be horrible to wake up one morning and find its actually working!!!
I have gone through what the Poster went through and its really frustrating, irritating! if you compare the air suspension to the one in the Landcruiser, well they are just worlds apart!
Once it starts to mess around like yours and back and forth to the garage, this and that it will be a forever ongoing thingy!
Rip it all out and convert to the very best conventional strutts, suspension money can buy and you save yourself ending up at the Pathologist! and you have a great car!
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
