After a couple of weeks of tire pressure warnings that disappeared as mysteriously as they appeared, I am now getting front driver's side parking aid sensor warning as soon as I put the car in reverse. It happens nearly every single time the car is put in reverse. I say nearly every time because on a couple of occasions it has behaved normally when backing up on a downhill slope. This leads me to believe that it's an alignment problem of some kind, because a) it shouldin't activate when going in reverse if you're not close to anything in the front, and b) if it was a bad sensor why would it work occasionally? Is there a way to align the sensor? Or any other suggestions? Right now, I manually turn off the system when reversing so that I don't have to hear that awful, constant beep.

 

Sounds like a wiring issue. The tpms antennas and the parking sensors are in the same wiring harness.