humming noise when engine is not running
Last evening I walked past my 2019 Tacoma parked in my garage. It had not
been running for about 6 hours. I noticed what sounded like a small electric
motor running under the bed of the truck. I turned the ignition key to the on
position for a moment then back to the off position and the noise stopped.
Could this be a fuel pump and if so, why would it be running if the engine was
not running?
Definitely sounds like the fuel pump. Probably the relay is sticking. Have your Toyota dealer check it out and fix it for free. Hope that helps! Jim
I am sure some dealers would love for you to bring it in for "required" service. However I just heard this sound under my 2017 Highlander (owned it for 18 months and first time I had been standing next to it in a quiet garage 5 hours after it was parked). Sounded like very small compresser under car behind back passenger side wheel. Checked google and after reading through all the "experts" with definite answers to the question (from malfunctioning fuel pumps to normal cooling fans), I found the real answer. Which is, "a perfectly normal noise of a fuel leakage check that happens approximately 5 hours after your car has been turned off". It sounds like this may be the same sound you are hearing. Check the first page in your owner's manual, after the contents, in the section "For your information" (page 8 in the Highlander manual).
I have a 2019 highlander and it is doing the same thin. Thanks
its the pump inside the charcoal canister doing a self test
Thanks for the info guys have the same thing with my 19 tacoma ...
1 year old trucks have a warranty people!
Strange that I had a 2016 Tacoma Off Road (4x4) and it never made the noise ... Got a new 2020 Tacoma Off Road (2x4) and it makes the noise
I have a 2021 Tacoma I just bought on Christmas. Walked by my truck on the driveway and heard the noise and co fused the heck outta me. I hope it’s just testing itself. That’s weird
I just heard the fuel pump in my new 2020 Tacoma, yes alarming when your vehicle is parked in a garage attached to the house. Put the Taco in accessories & off the pump stopped. Now I can go to sleep at least! Thanks for information.
I heard this noise multiple times when my 2020 Tacoma was in garage and had not been driven for ay least 6 hours. I assumed it was any number of electrical things in the garage but was never able to figure it out. Last night I heard it again and after locating it coming from under the bed of the truck, I opened the door for the gas and completely opened the gas cap. Noise stopped immediately.
