jakobbecker27

Ulysee Jerking and Hissing

My 2008 Fiat Ulysee, gasoline engine, has been acting up. 93k km on the clock. The check engine light is on and it's jerking when I accelerate. I hear a whistling, almost hissing, noise too. Sometimes it even stalls at idle. Fuel consumption is also higher, and the engine seems down on power. Could it be the boost pressure sensor? Defective cable or plug?

A 2008 Fiat Ulysee with 93,000 km is experiencing jerking during acceleration, a hissing noise, stalling at idle, increased fuel consumption, and reduced engine power, with the check engine light on. These symptoms suggest a potential issue with the boost pressure sensor or a defective cable or plug. A similar case confirmed that a loud hissing noise often indicates a turbo system problem, such as a loose hose or faulty sensor. The recommended solution is to have the vehicle inspected at a workshop to prevent further damage, which in this case confirmed a defective boost pressure sensor and cable.

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4 comment(s)

Sounds familiar. I've got a Ulysee too. Had similar symptoms - check engine light, jerking, the whole shebang. Was it accompanied by any whistling or hissing sounds when accelerating? It could very well be the boost pressure sensor. How did you arrive at that conclusion?

Yes, there's a loud hissing when accelerating. I suspected the pressure sensor because of the symptoms matching what I found online. You mentioned similar symptoms; was it the same sensor in your case?

Yep, loud hissing points to a turbo leak. My issue was indeed related to the turbo system. I'd suggest getting it checked at a workshop; they can pinpoint the exact cause. Could be a loose hose or the sensor itself. Don't keep driving it like that, you might end up damaging more components.

Thanks for the advice. Took it to the workshop, and you were right. Bad boost pressure sensor, as suspected. Cable was indeed defective. Total cost was 95€. All good now.

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FIAT

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ULYSEE