Espace diesel boost solenoid issue

I'm having serious issues with my 2013 Renault Espace diesel. The check engine light keeps popping on, and the car feels like it's lost power. It's got 115469 km on the clock. Acceleration is sluggish, and I'm burning through fuel! I've read about boost pressure problems, and how a faulty vacuum switching valve (boost solenoid) could be the culprit. Has anyone else experienced this? I'm not a mechanic, so any advice is appreciated!

4 comment(s)

I had similar symptoms in my Espace. It could well be a boost pressure control fault. When under load, are you noticing any unusual pressure drop or compressor surge, according to the pressure sensor data?

Thanks for the quick response! Pressure drop and compressor surge? I don't have the equipment to measure that. I was hoping someone might say 'Yeah, my boost solenoid was bad, replaced it, and all good'. Is there any way to be sure it's the boost solenoid?

While a faulty boost solenoid is a strong possibility, a precise diagnosis requires more sophisticated testing. Given the symptoms and potential cause, I recommend a professional workshop to ascertain if the vacuum switching valve is indeed defective. This would be preferable to replacing components arbitrarily.

Okay, thanks for the advice. I took it to the shop, and you were spot on. The boost solenoid was indeed faulty. The repair cost 140€, and now it runs like a champ again!

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