DS4 System Readiness Failure

Hmm, incomplete system readiness after OBD2 readout... sounds like the system is stuck in limbo. It's like when your computer freezes halfway through an update. First, are you sure the diagnostic tool you used was fully compatible with your DS4? Some cheaper ones can cause more problems than they solve. Also, what exactly were you trying to diagnose when you hooked it up?

Good questions! The tool should have been compatible – it's a fairly reputable brand. As for what I was checking, I was just running a general scan because I thought I felt a slight drop in fuel efficiency. Nothing specific, just a 'health check,' you could say. Could that really mess things up that badly? Any chance it clears itself after some drive cycles?

A general scan shouldn't normally cause that much chaos, but glitches happen. Think of it like a digital sneeze - sometimes the computer just misinterprets something. It might clear itself, but honestly, with those symptoms, I wouldn't bank on it. If it was my car, I'd swallow my pride and have a workshop run a proper diagnostic. They've got the proper tools and experience to un-stick these things.

Just so you know: you were spot on! I took it to a friend who knows his way around Citroens, and he basically just forced a computer reset. Apparently, the OBD2 tool glitched out and threw the readiness monitors into a confused state. No parts, no labor (he wouldn't let me pay!), just a quick software fix. Chalk it up to the joys of modern car ownership, eh? Thanks for the advice, much appreciated! Total repair cost: 0€!