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High pitch intermittent whine from under dash 2005 Nissan Pathfin

The high-pitch whine is intermittent. After stopping the vehicle and turning off the engine, the noise "winds down" in volume and pitch until ceasing about 5-10 seconds later.
While driving, putting my foot under the pedal and exerting upward pressure, elevating the pedal less than a 1/6" stops the noise. Depressing the pedal 1/16" from its normal position also stops the noise.
First thought to be a vacuum leak, now I think its linked to the brake system electronics. Noise sounds more electrical than air-generated. Noise appears to emanate from electrical component under dash on driver's side that looks like a 1"x3" aluminum canister.
Generally only hear noise on warm days. While sensitive to ambient temperature, it makes the noise with or without AC operating. Any ideas?

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: High pitched electronic/dentist drill sound when accelerating.

Probably the front differential, your probably hearing the famous differential gear whine. Change the oil, put Lucas for gears in it. You can get a hand operated oil pump to **** it out through the dip stick if it has one. Then fill it with the recommended amount.

Posted on May 06, 2009

pippall
  • 1486 Answers

SOURCE: My 2007 Hyundai Sonata started making this high

Front brake caliper not releasing.Piston starting to seize

Posted on Jun 08, 2009

steve_e_uk
  • 1675 Answers

SOURCE: When I start my Nissan Murano 2005, it makes a

hi this sounds like it could be one of the bearings that the serpentine belt runs on, or even the belt itself, is it more of a squealing noise? rather than a whining noise? if its a squeal it is possibly the belt , but if its as you say a whining noise you need to check the tensioners and pulleys, the best way to do this is to remove the serpentine belt, and the pulleys you can spin by hand just spin, if they sound grindy and or loose that will be the problem,with the other ones like power steering pump and water pump, just pull them back a forward and side to side, if you get allot of movement in them it might mean the bearings have gone in them if none of them are rough or loose, it will be the belt..hope that helps

Posted on Mar 24, 2010

  • 84 Answers

SOURCE: Service engine soon indicator on and a buzzing/whining noise.

i recommend that you take it into auto-zone or a car shop asap. from what you have described the ticking as, it sounds like a bottom knock. as for the whine i don't know.

Posted on May 14, 2010

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Hi Pullerwife,

I have a few suggestions for you,

First of all, check your air filter, make sure its clean, not clogged, and doesn't need to be changed.

I don't know how handy you are, but if you are fairly handy, check the idler pulley bearings, if your not, have a shop check it out, as a last resort.

Power steering pump/fluid being low is also a possibility, but thats usually more of a lower pitched whine then what you describe.

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Hope I've helped, and don't forget to rate.

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