Electrical Buzzing?
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Freshman User
Joined: Sep 2018
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From: Crosby, Texas
It is all the time as far as I can tell. Turn on the truck and could be idling for 10 min warming while I am loading stuff and go to get in and you hear the buzzing under the truck still.
Lead Driver
Joined: Jan 2010
Posts: 6,600
Likes: 83
Put an ear close to the DFCM and see if you can be certain that is the noise you are hearing. Filter issues will cause the LPFP to become noisy.
Not under the truck but the 2011 has other noises within the engine bay. A bad wastegate solenoid will make a buzzing noise while running (KOER) and several seconds after shutdown until the actuator moves.
Additionally, anytime the BCM activates parking/interior lights, there is an electrical buzzing type noise for one second. I recently discovered mine does this at random as well, which I can't see is normal though. I was near the truck, it had not been started in a week, the key was in the house and it made the same noise it makes when I unlock the doors except nothing occurred visually.
Not under the truck but the 2011 has other noises within the engine bay. A bad wastegate solenoid will make a buzzing noise while running (KOER) and several seconds after shutdown until the actuator moves.
Additionally, anytime the BCM activates parking/interior lights, there is an electrical buzzing type noise for one second. I recently discovered mine does this at random as well, which I can't see is normal though. I was near the truck, it had not been started in a week, the key was in the house and it made the same noise it makes when I unlock the doors except nothing occurred visually.
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Thread Starter
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Freshman User
Joined: Sep 2018
Posts: 44
Likes: 0
From: Crosby, Texas
Put an ear close to the DFCM and see if you can be certain that is the noise you are hearing. Filter issues will cause the LPFP to become noisy.
Not under the truck but the 2011 has other noises within the engine bay. A bad wastegate solenoid will make a buzzing noise while running (KOER) and several seconds after shutdown until the actuator moves.
Additionally, anytime the BCM activates parking/interior lights, there is an electrical buzzing type noise for one second. I recently discovered mine does this at random as well, which I can't see is normal though. I was near the truck, it had not been started in a week, the key was in the house and it made the same noise it makes when I unlock the doors except nothing occurred visually.
Not under the truck but the 2011 has other noises within the engine bay. A bad wastegate solenoid will make a buzzing noise while running (KOER) and several seconds after shutdown until the actuator moves.
Additionally, anytime the BCM activates parking/interior lights, there is an electrical buzzing type noise for one second. I recently discovered mine does this at random as well, which I can't see is normal though. I was near the truck, it had not been started in a week, the key was in the house and it made the same noise it makes when I unlock the doors except nothing occurred visually.
if I can post a video later I will the sound is coming from under the driver door and passenger doors on the driver side.
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Lead Driver
Joined: Jan 2010
Posts: 6,600
Likes: 83
That's the DFCM/LPFP. Does it make the same noise key on engine off until it shuts off after 30 seconds?
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