djg303

Thanks for the advice. I did a basic battery test using a multimeter - capacity is good and not dropping below 10v on cranking. I visually checked the wiring across all 4 rear sensors, and it all looks undamaged. Not sure how to test it though. I've managed to get everything back to the original state. I now have the original sensor back in; no error on the screen, but the sensor sticks on when in reverse (I.e. as though that one sensor is really close to something). Might it be that the replacement sensor I bought (despite looking identical and being a perfect fit) is wrong? It's one of these: https://www.amazon.co.uk/dp/B0CNGKMN12?ref=ppx_yo2ov_dt_b_fed_asin_title Thanks again.

One of my rear parking sensors started sticking on. Pretty clear from the graphic on the screen that it was rear right. So, I bought a replacement that was identical and a perfect fit. Swapped it (easy enough) and got an error and no PDC working at all. I assumed it meant the one I bought was wrong, so I put the original one back in, but the error now persists and I have no PDC! Seems odd, as it was working before (albeit sticking on)!? Not sure what to do now....