If the PDC module doesn't see the sensors, it'll sound a warning inside the vehicle. Removing the wiring means the PDC module won't see the sensors, so it'll sound a warning.

You need a rear only sensor PDC module, which won't be looking for front sensors.

This one doesn't have pins in the centre connection location, so it's a rear sensor only unit.

https://www.ebay.co.uk/sch/i.html?_nkw=126...5467.l1311 Hyundai Ioniq 5 Ultimate. The family car.
2009 Rimini Red SE TD4. Gone.
2006 Tonga Green i6 HSE. Gone.
Audi A5 convertible, my daily driver.
1972 Hillman Avenger GT, the project.