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ameliemayer1

DS4 System Readiness Failure

Alright, I've got a head-scratcher! My 2017 Citroen DS4 diesel is throwing a hissy fit. Mileage is at 68351 km. The main issue? A system readiness check that stubbornly refuses to complete. I'm getting an error stored in the error memory and seeing an annoying message in the speedometer. This all started right after I had the car hooked up for some OBD2 diagnostics. Could that have scrambled something? I'm pulling my hair out here!

Summary of the thread

A 2017 Citroen DS4 diesel experienced a system readiness failure after an OBD2 diagnostic, resulting in an error message on the speedometer. The issue likely stemmed from a glitch caused by the diagnostic tool, which confused the system readiness monitors. The suggested solution was to have a professional perform a proper diagnostic. Ultimately, a friend resolved the issue by performing a computer reset, clearing the error without any cost.

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4 comment(s)

jonaswinkler7

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?

ameliemayer1 (community.author)

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?

jonaswinkler7

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.

ameliemayer1 (community.author)

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€!

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CITROEN

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DS4