The suspension fault is very intermitent, and I've been unable to identify anything that triggers the inflation, apart from all the instances occuring whilst driving. I get an audible 'chime' alarm & a brief 'suspension faulty' message. I have a 2005 C4 1.4 Petrol and failed MOT because my rear fog lamp was not working at all. After a quick check the front fog lamp is not working too. I have to mention that I just bought the car and noticed about the fault after. I do not have any faults on the dashboard, and when I try to switch on the fog lamps no light is coming on the stalk. Here UOBD2 show the PSA Diagbox 9.12 software download link,and here also share the procedures on how to install PSA Diagbox 9.12 software.But this version it have not bee tested,it can not work on your interface 100%.And if you want to get a 100% solution,you can check here: LEXIA 3 cable include software v7.8.3 tested 100% work! This would then disappear on the next few startups only to appear again randomly. Of course this wouldn't ever happen when I was at the dealer so I resorted to a video to prove I wasn't insane! Anyway - it turned out this was a wiring harness fault (known by Citroen) and I believe it gets snagged under one of the seats and triggers a fault. I drive a 5 seat model C4 Pic on an 08 plate and have been having problems with the rear suspension, on and off (literally), for a few months. An internet search led me to this forum and I have to thank everyone for the info they have posted as it was really useful both just in general advice but also to know that I wasn't alone (sounds like Add. MicksGarage.com. Unit 50, Park West Road, Park West Industrial Park, Dublin 12. Ireland. D12 YE35. Citroen C4 Suspension And Shock Mounts Available Here. Faulty suspension and shock mounts leave you with a less cushioned, squeakier ride and can wear through a set of tyres fast. The intermittent suspension fault has been going on long before the battery getting low. I've only noticed the battery (on start up) the last 2 weeks, but I agree it may be causing the other faults. Also I do get other random little electrical faults, like windows not going up or down, not all at the same time. What to look for when buying a Citroën C4 Picasso 2013 - 2018, covering common problems to check for and overall vehicle reliability. Front suspension failure. Citroen C4 Picasso 1.6 E Ezml7k.