Noise from under vehicle after turning off the hybrid system

Approximately five hours after the hybrid system is turned off, you may hear sound coming from under the vehicle for several minutes. This is the sound of a fuel evaporation leakage check and, it does not indicate a malfunction.

 

Would prefer that Toyota be more transparent about what is causing this. Approximately five hours after the hybrid system is turned off, you may hear sound coming from under the vehicle for several minutes. This is the sound of a fuel evaporation leakage check and, it does not indicate a malfunction.

"We've learned not to worry about odd clicking or humming noises our hybrid Toyota makes when parked in the garage. The RAV4 owner's manual says: ""Approximately five hours after the hybrid system is turned off, you may hear sound coming from under the vehicle for several minutes."

Squeaking and squealing noises (particularly at idle) could be indicative of loose, worn, or slipping drive belts. Another culprit could be loose, or poorly aligned drive belt pulleys. One thing you don’t have to worry about is an alternator, as hybrids typically don’t have them. More Hybrid Gasoline Engine Related Bad Noises

Hybrids and electric cars under propulsion can be so quiet the National Highway Traffic Safety Administration has issued a proposal requiring them to come equipped with a device to make them more audible to pedestrians, especially visually impaired individuals.

 

I have a Sonata plug in hybrid and a Altima hybrid, no unusual noise in reverse. 48 people found this helpful. Checked with service at our Toyota dealer. Said the noise was for warning pedestrians

I bought a RAV4 hybrid and love everything about it except for that loud noise that just started last Thursday after my first 5000 mile maintenance. I took it back in and they all said it was a normal sound made for the hybrid as everyone above has shared.

There is an NHTSA requirement that all cars with electric drive trains have to emit a noise when going 19 mph or less effective Sept 2019. That sis forward and reverse. However my rav4 makes this loud whining noise ONLY in reverse. 47 people found this helpful. So what is the correct answer???? 21 people found this helpful.

There are a number of Toyota models that are affected by the alleged Bluetooth problems and, as a result, are considered a “class vehicle” in the class action. The lawsuit lists various makes of the Toyota 4Runner, Highlander, Prius, Sequoia, Sienna, Avalon, Camry, Tacoma, Tundra, and Yaris as the affected models.