Skoda Praktik Parking Aid Problem

Sounds like a familiar issue. Have you checked the connections to the parking sensors themselves? Especially after winter, corrosion can build up and cause intermittent faults.

Good point. Is there a common place where the wiring harness is prone to damage on the Praktik? I'm trying to avoid tearing apart the whole bumper if possible.

Yes, I've seen similar issues, often with faulty wiring. While it could be the control module, the error memory pointing to wiring is a good lead. If you're not comfortable tracing the wiring yourself, I'd recommend a workshop visit. It's usually a straightforward fix, but chasing electrical gremlins can be time-consuming.

I took it to the workshop, and it was indeed a faulty wiring harness to one of the parking sensors. 95€ later, and the parking assist is working again.