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Discussion Starter · #1 · (Edited)
SOLVED! - 2015 Volvo XC60 has a High-Pitched Dog Whistle

This high-pitched noise is on for 3 seconds then off for 3 seconds and then back on the 3, off for 3 - intermittent like that - for as long as the car is on.

It is not coming from the engine compartment. It is on whether the A/C is on or off. We have tried to see if it stops or changes if you turn on/off various things in the car. You can hear it even if the radio is playing (obviously not, if you turn up the radio volume enough).

It seems like it is a beacon - as if the car is searching for a Bluetooth or WiFi signal to connect with.

The Service Advisor has listened to it, and put his ear close to various components. He has ruled out the engine compartment and the A/C. The Service Advisor agrees that it seems to be coming from somewhere near the media controls in the center console. He has not run into this problem before and is as baffled as me.

This is like a Chinese water torture. Any suggestions to resolve this will be greatly appreciated.

SOLVED! - - - Update: SOLVED! Working with the Service Advisor, we learned that the vehicle was behind on software updates. I choked at the price, as it was over $600. SA claimed that Volvo actually charges the dealer for these, so he could not mark them down. (We also learned that other major car manufacturers, like Audi, also charge their customers in this manner.)

In attempting to initiate the downloads, it was discovered that the USB port was bad. Another $128.

Bottom line: High-Pitched whistle is gone! Not sure which fix solved this problem.
 

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Well, I experienced this noise today. But my car already has the RDAR and 2.0 software updates. I agree this whistle sounds like a signal because it is steady like three pulses and then stops. Then it repeats again, but I’m not convinced it is electronic. Some threads say the whistling is the PCV trap. I’ve only heard this noise during one drive so need to investigate further.
 

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we learned that the vehicle was behind on software updates. I choked at the price, as it was over $600. SA claimed that Volvo actually charges the dealer for these, so he could not mark them down.
Well isn't that a load of BS?????? So you would have had that whistle/signal forever if you didn't pay them $600???

To me that's extortion. What did I buy???
 

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I would be interested to know if the software update referred to by your SA was made available while your vehicle was still under warranty. If so, I would make the argument that it should be provided without cost.
 

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There are other threads mentioning whistling noises. This is the only one saying the software update solves the problem. Take it with a grain of salt.

What I’m hearing in my car is three high pitched whistles that repeat. One possibility is I had a heavy bag on the passenger seat. The seat belt warning chimed earlier, thinking it was a person not wearing their seat belt. Another possibility is just wind noise at a certain speed. Does anyone know if the seatbelt warning gives a continuous high pitched signal after the initial chime?
 
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