First post. Thanks for the helpful information I had read so far.

My Rear park aid disabled. Need help.

'Check rear park aid' error message on my dash. I listened to each of the sensors on the rear bumper and they are all clicking. There is no sound from the park aid speaker. I read the error code on the "Forscan" app on my iPhone using the ELM327. Here is the code: B1B52 - Rear Sounder
Additional Fault Symptom: Circuit short to ground or open
Module:Parking Aid Module

Any help is greatly appreciated. I'm thinking it's the speaker or a wire harness.

Welcome to EBPF!  Very likely wiring.  If you pull the connectors apart, you may find rust built up in there.  So cleaning them out and giving them a bath in dielectric grease before reconnecting could be just the ticket.

Thanks. To clarify, would that be the connectors by the parking aid module and or under the rear bumper?

Under the rear bumper.

Likely a faulty sensor ive had mine replaced twice. Is covered on ford extended warranty.