tildabecker99

Etios Hissing and Fuel Consumption

My 2014 Toyota Etios (gasoline engine) is acting up. It's only got 23205 km on it! I'm getting terrible fuel consumption, the check engine light is on, and when I accelerate I hear a loud hissing sound. I'm guessing it's some kind of air leak. Could it be the throttle body?

A 2014 Toyota Etios with low mileage is experiencing poor fuel consumption, a check engine light, and a loud hissing sound during acceleration. The issue is suspected to be an air leak, possibly from the throttle body. A vacuum leak, particularly from a cracked intake hose, is identified as a likely cause, which can affect the air-fuel mixture and trigger the check engine light. The problem is resolved by replacing the leaking intake hose, restoring normal fuel economy and eliminating the hissing sound.

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4 comment(s)

Sounds familiar! I had something similar happen on my Etios. That hissing points to a vacuum leak for sure. Check all the hoses connected to your intake manifold, especially the intake hose between the air filter box and the throttle body. Are you hearing the hissing all the time or just when the engine is cold?

Thanks! So, a vacuum hose... That makes sense. I'll check those hoses first thing tomorrow. But what does the turbocharger do? And could the hose cause the check engine light to come on, too?

The Etios doesn't have a turbocharger, so you can rule that out. And yeah, a vacuum leak definitely triggers the check engine light because it messes with the air-fuel mixture. If you find a cracked hose, try replacing it yourself. Otherwise, just take it to a workshop. It's what I did. Good luck!

Awesome, thanks so much for the help! I took it to a mechanic and you were spot on – it was a leaking intake hose. Cost me around 100€ to get fixed. Fuel economy is back to normal and the hissing is gone!

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TOYOTA

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ETIOS