I have a 2003 MCS with rear parking sensors.
Originally when I bought the car I had the 10 second tone telling me there was a sensor not working.
Checked the codes and it said - inside right sensor was faulty. Changed this for a new one and they seemed to be working ok. Didn’t get the 10 second tone, they bleeped ok. But the outside right sensor didn’t seem to sense any movement, so I changed this one too.
Now, I don’t get the 10 second tone or bleeping!!!
Checked the codes on INPA, 1 error, cleared it but still the same......
Any ideas???