2015 Tundra Cm hiss

When I turn my truck off it makes a hiss like sound or blows out air somewhere. I just got it a few days ago and don’t know if this is normal for Tundras. I noticed my wife’s 2016 Highlander does it but can barely notice it on her car

 

SAIS? Air injection system could be the noise. You here it inside the truck or outside?

 

It sounds like you're describing the secondary air injection pump noise. I can't recall exactly what it's doing - something like purging moisture out of a line. If that's what you're hearing it's totally normal. You'll hear it on all the modern Toyotas apparently but I've only personally heard it on tundras tacos and 4runners. When we were house hunting I used to shut the tundra off next to the agent's 4runner and we'd make the noise together then lock our doors to the same beep tune. Took us 4 years to find the house so heard it a lot.

 

In the engine compartment.

 

thank you!

 

@1Tundra5 Secondary Air Injection System is failure prone and a known issue on Tundras. We deal with this issue everyday and happy to help answer any question for you. I have also included link below to some recent threads.

What Does the Secondary Air Injection System Do?
https://www.tundras.com/threads/what-does-the-secondary-air-injection-system-do.113683/

What Do My Secondary Air Injection Error Codes Mean?
https://www.tundras.com/threads/what-do-my-secondary-air-injection-error-codes-mean.113686/

How to Fix Secondary Air Injection System?
https://www.tundras.com/threads/how-do-you-fix-the-secondary-air-injection-system.113688/