Buzzing sound coming from speaker.

[JimmyThunderP]

First post here.

Bought a 66 plate Fiesta ST3 at the beginning of February, car has already had numerous problems. It's nearly been at the dealership garage longer than I've had it in my own hands (new master cylinder and slave cylinder within the first month) so this is just next in the list (after my tyre pressure sensor came up with a fault saying it's not detected day before yesterday. Tyre pressures ok. Course I'm sure this one could be down to the abysmal state of the roads) and I'm assuming will not be the last.

Very disappointing considering this was my first proper car (first car was a crappy old golf that did me very proud) but world's the world I suppose.

Anyway, on my drive to work this morning when I started my car there was a buzzing sound that would infrequently change pitch. Absolutely no music would play and I couldn't connect my phone. After work I took out the radio fuse and reinserted it as it seemed ok, and now the radio stations will play and I can connect my phone but can't play anything over Bluetooth.

To be clear, I am in no way blaming the car for this one as I have always had the bass high and the speakers relatively loud. But you can understand my frustration as it is just a compounded issue on top of others after barely a month of ownership.

Anybody got any advice? Dad's an engineer so access to tools etc... is no problem. Thanks in advance.

*Bolded for TLDR.

 

[SteveS]

The TPMS, if it was working and without any change whatsoever like changing tires or rotating them now is not working, would be from the battery in one of the TPMS sensors having died, which wouldn't be that uncommon in a model year 2016 car. If you did get new tires or rotate the tires, you need to relearn the TPMS sensors.

For the audio, it may be that you just need to master reset the Sync 3 system.

start from the SYNC 3 home screen, then press settings on the bottom feature bar. Next, press general, scroll down, and hit 'master reset'. A pop-up will then show up asking if you want to reset to factory defaults.

 

[JimmyThunderP]

Thank you for the response. Started it today and it just works again. Couldn't say why.

However, when I put in OBD reader to see if there was any fault (before realising that it just worked again randomly) all of the modules came up as either unknown or not exist. Dad says the reader worked perfectly on every other family car which is strange.

Anyway, that's a separate issue and not exactly pertinent, so thanks again for the response and I'll keep in mind if anything happens again.

I have also had a new tyre valve put in OS/F so it's probably as simple as you said. Cheers.

 

[SteveS]

Whoever put the tire valve in did you no favors by either putting in a valve with no TPMS sensor, or by putting in one with a TPMS sensor and not retraining the car to the sensors.