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Low moaning sound coming from my C-max


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4 replies to this topic

#1 OFFLINE   Aztoothman

Aztoothman

    New Member

  • C-MAX Hybrid Member
  • 2 posts
  • Region:U.S. Southern Plains
  • LocationMesa AZ
  • My C-MAX's Year:2013
  • Current Vehicle:C-max

Posted 31 January 2018 - 09:18 PM

My 2013 C-max has 82000 miles and in the last 3 months has started to display a intermittent low moaning sound from what sounds like the underside of the vehicle. It comes and goes as the speeds change. It will go away temporarily if i let up on the throttle and then come back as I accelerate again. The noise is louder when accelerating in the lower speeds. Has anyone else had this problem ? And if so, is it an issue that needs attention ?

 

John in Arizona









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#2 OFFLINE   Redshift

Redshift

    New Member

  • C-MAX Hybrid Member
  • 48 posts
  • Region:U.S. Pacific Coast
  • LocationTacoma, WA
  • My C-MAX's Year:2015
  • Current Vehicle:C-Max

Posted 01 February 2018 - 12:53 PM

I have a 2015 and it's always done that. Unless it does it constantly, the dealer can't do anything.


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#3 OFFLINE   obob

obob

    C-Max Hybrid Member

  • C-MAX Hybrid Member
  • 614 posts
  • Region:Decline
  • LocationUS
  • My C-MAX's Year:2013
  • Current Vehicle:C-MAX SE

Posted 01 February 2018 - 02:18 PM

Welcome Aztoothman.

 

I don't know if this is your noise but it seems synergistic with your description.  I have what I would call a drone sound when the internal combustion engine is running (ICE) and it is regeneration mode.    When I first bought the car it did not have it, but after one of the early software updates it started.  It may be they changed things to be more aggressive with recharging the battery.  I am used to it but if it did that when I tested the car I would think the car was noisy.  I am not sure if the later models have it but it is my understanding is that it is common on the 2013s. My drone/moan has slowly changed louder. Regeneration of the HVB(high voltage battery) mode can be identified with an up arrow thingy on the empower screen.  This condition probably is mentioned in one or more message threads on this forum but it not a situation that is worrisome to me.  

 

What is of concern is the 2013 transmission problems which there are also message threads discussing that.


Edited by obob, 01 February 2018 - 02:21 PM.

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#4 OFFLINE   fbov

fbov

    C-Max Hybrid Member

  • C-MAX Hybrid Platinum Member
  • 1,371 posts
  • Region:U.S. Northeast
  • LocationRochester, NY
  • My C-MAX's Year:2013
  • Current Vehicle:C-Max Hybrid

Posted 01 February 2018 - 04:29 PM

Welcome as well!

 

I'm not sure what obob is describing, but I do know what you're hearing. I first heard it visiting my daughter in Vermont, Thanksgiving 2014. Occurs rarely enough to ignore; I need a hill and just the right speed... and it might happen. 

 

Some owners have it worse and have tracked it to the cabin noise suppression system. Some of them have disabled the microphone, others pulled a fuse... problematic as I believe it uses the car's audio system. I treat is as a rare event and ignore it when it happens. 

 

HAve fun,

Frank


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#5 OFFLINE   Aztoothman

Aztoothman

    New Member

  • C-MAX Hybrid Member
  • 2 posts
  • Region:U.S. Southern Plains
  • LocationMesa AZ
  • My C-MAX's Year:2013
  • Current Vehicle:C-max

Posted 13 February 2018 - 09:40 PM

Thanks for the input. At least others have been experiencing this unusual noise. I'll just keep driving it and see what happens. I have to say that I don't understand why the C-max isn't more popular. Of all the cars I have owned over the years, my C-max is more fun to drive, and more of a car then any of the others.

 

 

John in Arizona








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