Buzzing noise when engine is off
Thread Starter
Driver School Candidate
Joined: Sep 2015
Posts: 41
Likes: 4
From: FLORIDA
Buzzing noise when engine is off
Just picked up my RX 350 yesterday. I was playing the radio and speaker settings in my garage today. I noticed a buzzing noise most likely from under the hood when I press the engine switch once or twice to Accessory or Ignition On mode. The engine is not running for this case (maybe it still has this noise when engine is running but couldn't hear). The noise goes up and down a little bit but just not goes away even after half hour. This is much more noticeable when all the front windows are open and in a quite garage environment. Does anyone notice this and can you explain a little bit if you know what it is? Hopefully it is normal but just want to confirm with you guys!
Jack
Jack
No, I don't play soccer!
Joined: Jul 2009
Posts: 6,652
Likes: 177
From: NJ
Could be fuel evaporation leakage check. It's something the 3RX does up to five hours after the vehicle is turned off. I haven't looked through the 4RX manual but that would be my best guess. The noise is normal.
Last edited by kitlz; Jan 2, 2016 at 04:54 AM.
Lexus Test Driver
Joined: Apr 2014
Posts: 1,161
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From: ca
Was reading the manual yesterday and yes, that is the noise it could make.
Thread Starter
Driver School Candidate
Joined: Sep 2015
Posts: 41
Likes: 4
From: FLORIDA
Thanks for your reply! I have stayed in the car for more than half an hour but still can hear the noise. As soon as I turned off the car completely (engine switch in OFF position), the noise goes away. Hopefully it is what you explained. Will confirm with dealer next time.
Lexus Champion
Joined: Sep 2012
Posts: 3,438
Likes: 88
From: SoFlo
What he's describing doesn't sound like the evaporator check, which comes on a good number of hours after the car is shut down. Sound like its some solenoid or switch in the engine bay. More than likely normal. With the engine off, it's easier to hear all the electronic actuators and other parts moving.
Buzzing noise from rear wheel when engine is off
has anyone else heard a buzzing noise from the rear wheels. Mine was specifically on the passenger side.
the noise happened when the car had been parked all day and was off. I noticed it when I stepped in the garage to throw out trash. The noise was not there right after I parked or maybe an hour or two after when I was in the garage for something else.
it almost sounds like a small motor actuator or something. heard twice in the last two days. It stopped when i started the car and then turned it off. It also stopped when I kicked the tire. Not sure if this was a coincidence.
the noise happened when the car had been parked all day and was off. I noticed it when I stepped in the garage to throw out trash. The noise was not there right after I parked or maybe an hour or two after when I was in the garage for something else.
it almost sounds like a small motor actuator or something. heard twice in the last two days. It stopped when i started the car and then turned it off. It also stopped when I kicked the tire. Not sure if this was a coincidence.
Last edited by chunktwo; Nov 18, 2017 at 02:39 PM.
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No, I don't play soccer!
Joined: Jul 2009
Posts: 6,652
Likes: 177
From: NJ
chunktwo, the buzzing noise is probably from the RX doing the fuel evaporation leakage check. It can come on immediately after turning off the vehicle to several hours later. There's a short paragraph on page 8 of the owners manual regarding it.
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thanks again alleviating my concern without flaming me to search first.
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Joined: Aug 2006
Posts: 645
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From: NJ
Strange Noise From Rear End With Engine Off
First of all - Happy New Years to all!
Tonight I was in my garage and I heard a constant vibrating, almost electrical sounding tone/rattle coming from the bottom rear of the RX. The engine had been off for about 5 hours. I started the RX and ran it for about 10 seconds and then shut it off. The noise stopped. Since I am not a big believer of coincidences, I am wondering if the following set this off: Earlier in the evening after I garaged the RX and shut off the engine, I poured 12 ounces of isopropyl dry gas into the tank (temps here have been below 10 degrees). I'm wondering if this set off anything related to the emissions system. Any thoughts on this would be appreciated.
Tonight I was in my garage and I heard a constant vibrating, almost electrical sounding tone/rattle coming from the bottom rear of the RX. The engine had been off for about 5 hours. I started the RX and ran it for about 10 seconds and then shut it off. The noise stopped. Since I am not a big believer of coincidences, I am wondering if the following set this off: Earlier in the evening after I garaged the RX and shut off the engine, I poured 12 ounces of isopropyl dry gas into the tank (temps here have been below 10 degrees). I'm wondering if this set off anything related to the emissions system. Any thoughts on this would be appreciated.
Lexus Champion
Joined: Sep 2012
Posts: 3,438
Likes: 88
From: SoFlo
It is the fuel evap check, or something like that. It's discussed in the manual, and all over CL lol.
https://www.clublexus.com/forums/gs-...is-normal.html
https://www.clublexus.com/forums/gs-...is-normal.html
Driver
Joined: Nov 2017
Posts: 130
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From: Alberta
