i10 ABS Fault

I had a similar issue with my Hyundai i10, though I can't remember the exact year. The ABS light and traction control going haywire sound familiar. Have you checked the wheel speed sensors? In my case, one of the sensors was faulty, sending incorrect data to the ABS module, which caused problems with the speedometer and odometer readings too. Did you check the sensor input values using a diagnostic tool?

That's an interesting idea! I haven't actually checked the wheel speed sensors. I just assumed it was the control unit itself, since the whole system is so messed up. Could a single bad sensor really cause all of these problems?

It's worth checking before you replace the control unit, which is the most expensive part. In my case, yes, a faulty sensor caused the whole system to go mad. While your issue could still be the control unit, rule out the simpler possibilities first. Given the initial diagnostics report, I would take it to a reliable workshop to confirm. It’s what I ended up doing back then.

Thanks for the advice! I'll check the wheel speed sensors first. If that doesn't work, I'll take it to a workshop. Just to let you know, it was the ABS control unit. Workshop fixed it for 1000€.