lisa_schulze1

Peugeot 207 Hissing Noise and Fuel Consumption

I've got a 2010 Peugeot 207 with a gasoline engine that's giving me some grief. It's done 215378 km. Lately, the fuel consumption has gone way up, and the check engine light keeps popping on. Also, when I accelerate, there's this loud hissing sound, almost like air escaping. I'm no mechanic, but could this be a leak somewhere?

A 2010 Peugeot 207 was experiencing increased fuel consumption, a check engine light, and a loud hissing noise during acceleration. The problem was suspected to be a leak, possibly in the intake system. Upon inspection, a split intake hose was identified as the cause. Replacing the hose resolved the issues, eliminating the hissing noise, turning off the check engine light, and normalizing fuel consumption.

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4 comment(s)

I had something similar happen with my 207. Check all the hoses connected to the intake manifold, especially the one running from the air filter box to the engine. Pay close attention to where the hose clamps are. Is the hissing sound constant, or does it change with engine speed? Any rough idling or misfires?

Thanks for the tip! I'll definitely check those hoses. The hissing gets louder as the engine revs higher. As for the engine, it seems to be running okay at idle, though I think I felt a slight misfire yesterday. What exactly was leaking on yours?

Sounds very much like the intake hose. Mine had a split on the underside, near the manifold. It's a common issue, apparently. You can try to find it yourself, but honestly, with those symptoms, it's best to have a workshop do a proper leak detection. They'll be able to pinpoint it quickly and prevent any further engine damage.

Okay, thanks a lot for the advice! I took it to the workshop, and you were spot on – it was a split intake hose. They replaced it, and the hissing is gone, the check engine light is off, and the fuel consumption is back to normal. Cost me 100€. Thanks again for pointing me in the right direction!

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PEUGEOT

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207