Noise after CX-5 is turned off..?

[nickswhip24]

Hearing a "whirring" noise for about a minute after turning car off-nothing seems to be running...happens all times-engine warm or cool
anyone else have this? Thanks!

 

[BoomerZoomr]

My Mazdas do that… the sound is very low. Fuel pump maybe… I don’t know.

 

[N7turbo]

Fuel pump. They all do it, even my Pontiacs from 20 years ago did it.

 

[nickswhip24]

fuel pump....huh...ok...strange...so it needs to be ready for the next cycle or something-sorry ...first car with a high pressure fuel system....i saw some videos online and most were headlight issue's...i would love to repost the small video i saw on this site....at the very end of it...you get a 2 second soundbite of what i hear-guess i could do my own little video as well

 

[N7turbo]

Yes, the headlight is also a possibility and is known issue. I've so far been lucky that my 2023 doesn't have it (knock on wood), even as I see several other 2023's failing. Make sure it's not coming from a headlight and if it is, take it in for a warranty replacement asap.

 

[cz5gt]

Fuel pump. They all do it, even my Pontiacs from 20 years ago did it.

its not the fuel pump.
Its the throttle body as far as I know. Hear a final "flap/click" sound after 40-50sec and the noise is gone.

Yea the Headlight issue/noise is a warranty item. Separate type of noise.

 

[N7turbo]

Its the throttle body as far as I know. Hear a final "flap/click" sound after 40-50sec and the noise is gone.

We're talking about the whine, I thought?

 

[cz5gt]

I was referring to the whirring/buzzin noise from the engine compartment upon engine shutdown. For about 1 minute, then a click/flap closing and no more buzzing. My Turbo CX5 does that.

 

[RL911]

It’s the fan to cool the headlights.

 

[N7turbo]

Even our V6 Turbo Diesel Mercedes has the fuel pump sound.

This is really easy to hear if you're in a garage.

 

[cz5gt]

Which fuel pump are you talking about?
Only the one in the fuel tank is electric. The buzzing noise is in the engine compartment.

 

[nickswhip24]

its not the fuel pump.
Its the throttle body as far as I know. Hear a final "flap/click" sound after 40-50sec and the noise is gone.

Yea the Headlight issue/noise is a warranty item. Separate type of noise.

i think you are correct-i am putting my cupped hands over hpfp and pitch changes,then in series i hear 1 click,then 1 click near throttle body then 1 more click from relay box and its gone-just strange because i am around a few other cx-5's and i dont hear it-last nite i heard sounds like the pump was still running-grabbed a little screwdriver to put on top of solenoid but i guess the voltage was to low to feel the magnetism,if i really want to get nuts i could get tools to check fuel rail pressure or back probe the solenoid-still under warranty so this is why i am on the hunt,thanks
of course my ocd is strong on this so i will keep learning and get back if i get the answer

 

[RattleCanAR]

It's not the fuel pump. My CX50 H and my CX5 NA both make the noise. I think it's headlight fans. I don't see why it's a warranty issue, it's normal and they all do it for 5 seconds or so after you turn off the car.

 

[N7turbo]

And they run even if you don't use the headlights?