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My wife and I purchased a touring L plus in February of this year and for the most part, are very happy with the purchase. We have been experiencing a high-pitched whistling noise from the front of the vehicle while driving at highway speeds. The sound is loudest between 68 and 72 mph which is quite frustrating. We have taken it to the dealership for warranty work and they were able to reproduce the noise but unable to recommend a fix indicating that as the car ages, the noise will subside. 2000 miles later, we still have the noise. When we were shopping initially, I heard that same noise on another Touring L Pacifica at similar highway speeds. Has anybody else heard this noise or had it fixed by their dealership?
With two kids, 1 and 3 years old, they often sleep on long/highway drives and we usually have the radio off. Therefore, I hear this noise clearly and it is very annoying.
I’m scheduling a follow-up appointment with our dealership, but we are unable to get in prior to our last minute upcoming vacation. I’m going to request they mount acoustic mics to the vehicle to determine where the noise is coming from. Will follow-up once I get more information.
 

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I am having the exact same issue! Mine is a Touring-L Plus, 2017. I get a high pitched "whine" noise at exactly the same speed band. Now that I know the noise well I can also hear it a lower speed just not as noticeable. After some experimentation I've determined for myself that it must have something to do with the adaptive cruise control and whatever electrical system monitors the accelerator or fuel injection system. My guess is a bad transformer or something similar. I'm lead to believe this because if you let go of the accelerator in that speed band the sound almost immediately goes away and then returns once the accelerator is applied again (not wind or road noise for sure). The noise will also go away temporarily if you approach another vehicle with the ACC on and the vehicle begins to slow (the accelerator is released) and it also goes away in normal cruise control if you go over the crest of a hill and the accelerator is released as you go down the other side.

Have you had any luck finding a solution yet? This one is drive me nuts! I'm attempting to work though it with the local dealer however I suspect that will be along road.
 

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I am having the exact same issue! Mine is a Touring-L Plus, 2017. I get a high pitched "whine" noise at exactly the same speed band. Now that I know the noise well I can also hear it a lower speed just not as noticeable. After some experimentation I've determined for myself that it must have something to do with the adaptive cruise control and whatever electrical system monitors the accelerator or fuel injection system. My guess is a bad transformer or something similar. I'm lead to believe this because if you let go of the accelerator in that speed band the sound almost immediately goes away and then returns once the accelerator is applied again (not wind or road noise for sure). The noise will also go away temporarily if you approach another vehicle with the ACC on and the vehicle begins to slow (the accelerator is released) and it also goes away in normal cruise control if you go over the crest of a hill and the accelerator is released as you go down the other side.

Have you had any luck finding a solution yet? This one is drive me nuts! I'm attempting to work though it with the local dealer however I suspect that will be along road.
Hi gmcart,

Do you already have a case with our Customer Care department? If you do not, and your Pacifica is currently being serviced, we can get a case started for you. Just PM your VIN!

Kori
Chrysler Social Care Specialist
 

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Has a solution for this problem been found? My 2018 limited is having the exact same issue where between speeds 70 to 75mph a high pitched whistle can be heard from somewhere behind the left side dash. Very annoying!!! At first I believed it was a wind issue but I discovered when I turn the shifter into neutral the sound goes away and immediately returns when I place it back into drive. Any help on this would be greatly appreciated.
 

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Exact same problem with my 2017 Touring! At about 55mph I start hearing a whine. It is only present when the accelerator is lightly pressed, or when Cruise Control is maintaining speed. If I lift my foot (or CC lets up on the gas going downhill) the noise stops. My van is at the dealer right now as they try to figure out a solution. The tech drove it and he heard the whine. He said he never heard that before, and would check their troubleshooting database to see if there is a fix. My van does not have Adaptive Cruise Control, so that probably isn't it. I have only two complaints about this vehicle - number one is having to turn ESS off every time I start the van, but this whining noise is a close second!
 

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Exact same problem with my 2017 Touring! At about 55mph I start hearing a whine. It is only present when the accelerator is lightly pressed, or when Cruise Control is maintaining speed. If I lift my foot (or CC lets up on the gas going downhill) the noise stops. My van is at the dealer right now as they try to figure out a solution. The tech drove it and he heard the whine. He said he never heard that before, and would check their troubleshooting database to see if there is a fix. My van does not have Adaptive Cruise Control, so that probably isn't it. I have only two complaints about this vehicle - number one is having to turn ESS off every time I start the van, but this whining noise is a close second!
Hello fibble,

We apologize for the inconvenience you're experiencing with your Pacifica. Feel free to send us a direct message as we'd be glad to get a Case Specialist involved while you're in service.

Jasmine
Chrysler Social Care Specialist
 

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No solution found yet although my dealership has recognized that this sound is showing up on multiple vehicles on their lot. They told me that they contacted Chrysler about the issue and that there is no fix available. I then contacted Chrysler customer care (Canada) about this issue and I was told this morning that they have determined that this is a "characteristic of the vehicle" and will not be covered under warranty or investigated further. When I asked to speak to their supervisor or manager about this issue further they refused to transfer me. In a nut shell I've been told that they acknowledge the issue (they have found it in other vehicles) however they will not do anything about it and I will have to accept it as part of the vehicle.

Does anyone else have updates on a possible fix? My only hope is that I can let my dealership know what I've found on this forum. Chrysler is obviously not going to do anything about it. Very disappointing.
 

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Discussion Starter #8
I still have the issue... For over a year now. It is super annoying! I believe this is going to require Chrysler to mount mics to the various components in that area of the car to figure it out.

Please keep us in the loop if you get yours fixed.

I have a service appt next week and will ask for them to look at it again.


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We have that too, and just got back from a road trip in which I had to listen to that constantly. For me, this sounds like a very similar whine that the transmission of our Sienna was making prior to it's death. I think it's a tranny problem, which fits in line with a number of issues we've had.
 

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If it's behind the dash (high freq. are hard to pinpoint) my guess is it's electronic and possibly a "whining" coil (inductor) or a "singing" capacitor. I've heard both.

"Inductors

In inductors, also called reactors or chokes, magnetic energy is stored in the airgap of the magnetic circuit, where large Maxwell forces apply. Resulting noise and vibrations depend on airgap material and magnetic circuit geometry [10].

Transformers

In transformers magnetic noise and vibrations are generated by several phenomena depending on the load case which include Laplace force on the windings, Maxwell forces in the joints of the laminations, and magnetostriction inside the laminated core.

Capacitors

Capacitors are also subject to large electrostatic forces. When the capacitor voltage/current waveform is not constant and contains time harmonics, some harmonic electric forces appear and acoustic noise can be generated[11]. Ferroelectric capacitors also exhibit a piezoelectric effect that can be source of audible noise. This phenomenon is known as the "singing capacitor" effect[12]."

https://en.wikipedia.org/wiki/Electromagnetically_excited_acoustic_noise_and_vibration#Electromagnetic_noise_and_vibrations_in_passive_components
 

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I too have experienced this. I wouldn't call it a high pitched whistle- more like a "whirring" sound whenever I press the accelerator in the last gear. And it is not detectable if I have the radio or the Uconnect theater audio in the background.
 

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I too have experienced this. I wouldn't call it a high pitched whistle- more like a "whirring" sound whenever I press the accelerator in the last gear. And it is not detectable if I have the radio or the Uconnect theater audio in the background.


You've used 9th? How fast was that?
 

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I heard it for the first time yesterday. My immediate thought was maybe it is related to the noise cancelling system.
 

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Discussion Starter #14
Well, my Pacifica was at the dealership for 2 weeks. I demonstrated the issue for the service manager and took a brand new Pacifica (same specs) for a comparison drive. The new Pacifica did not make the same noise (confirmed by the dealership tech). A regional engineer came onsite two days ago and took it for a test drive with the service manager.
They were able to replicate the issue but unable to recommend a fix.

I was told that it is a normal characteristic of the vehicle... Very disappointing!

I have an open case with Chrysler North America. As a first time Chrysler owner, this is not the experience I was expecting.

Anybody else have better luck getting it resolved?


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BUMP!!

I just bought a 2017 with the same issue! Very annoying., I'd like to resurrect this thread and see who else has this issue. My thoughts.. electrical related.. Alternator? Almost like back in the day when bad spark plug wires would interfere with the radio.
accelerate it gets louder with the load let off the gas and it goes away.. UGH!
 

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BUMP!!

I just bought a 2017 with the same issue! Very annoying., I'd like to resurrect this thread and see who else has this issue. My thoughts.. electrical related.. Alternator? Almost like back in the day when bad spark plug wires would interfere with the radio.
accelerate it gets louder with the load let off the gas and it goes away.. UGH!
It wasn't making this noise when you test drove it?
 

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BUMP!!

I just bought a 2017 with the same issue! Very annoying., I'd like to resurrect this thread and see who else has this issue. My thoughts.. electrical related.. Alternator? Almost like back in the day when bad spark plug wires would interfere with the radio.
accelerate it gets louder with the load let off the gas and it goes away.. UGH!
Hello StayTrue28,

If you decide to have this looked at by the dealer, let us know. We're available via direct message and would be happy to help with that process.

Jasmine
Chrysler Social Care Specialist
 

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I’m sure this isn’t the same issue, but making sure the rear vents aren’t closed helps with some kinds of whistling noises.


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Hello StayTrue28,

If you decide to have this looked at by the dealer, let us know. We're available via direct message and would be happy to help with that process.

Jasmine
Chrysler Social Care Specialist
I have not yet but I do want to have the dealership take a look along with some other issues.
Thanks
 
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