Almost every time I take the LR3 anywhere I immediately get a suspension fault code. Is there a way to check ride height sensors? I replaced the front air struts about 6 months ago and haven’t really driven much since

 

What is the code?

 

I’m not sure. The next time I get the fault I’ll check it and see

 

...just read it. Do you have a GAP tool? What does the EAS actually do when the fault is present?

 

Fault codes are stored in the ECU, so it'll be there regardless of whether the fault is present at that time. Without the fault codes you're wasting your time.

 

C1A20-64 pressure increase too slow when filling reservoir

 

That code can mean a few things.

Compressor dying but not pulling excess amperage yet.
Exhaust valve sticking open a bit.
Air leak.
Cracked dryer cap casing a leak.
Hole in reservoir tank. Reservoir pressure itself is not measured though, just gallery pressure.

 

what's the best way to test a compressor

 

Rule out the cheap stuff: Taking DT's post as your starting point: Rule out a leak in the air tank by using soapy water to look for leaks in the obvious places/unions, etc. If you live in an area where the vehicle is subject to salt and corrosion, then the tank will rust out over time if not addressed. Those tests are free. After that, the next cheapest option is to rebuild the compressor (change the air dryer, etc). If the silica has failed then you may also need to change the seals on the front and rear valve blocks (o rings are readily available at about $20 from ebay). Lots of good info here and on the UK site (disco3.co.uk) and YT on how to do all of these tests/services. Kits are cheap. Start with that lot and see how you get on. Clear codes once you've done it and report back.

 

thanks for the help guys!