Skoda Scala Gasoline Boost Pressure Issue

Diagnostics are pointing towards a boost pressure control fault on my 2020 Skoda Scala with a gasoline engine. Check engine light is on, power is reduced, engine response is poor, and fuel consumption has increased. I suspect a defect in a vacuum switching valve, possibly the bypass valve. Anyone seen this before? What else could cause such a problem?

4 comment(s)

Sounds familiar. I had a similar issue with my Scala. Check engine light, power loss, the whole shebang. Did you check the boost solenoid and its vacuum lines? A small vacuum leak there can cause a pressure drop and trigger those symptoms.

Boost solenoid and vacuum lines, interesting. Was your issue intermittent, or was it a consistent problem? Did you notice any specific driving conditions that made it worse?

Mine was fairly consistent once it started. Seemed to be slightly worse under load, like going uphill. I'd say get it checked professionally. It could save you a lot of time and potential headaches.

It was the vacuum switching valve, like I thought. Replaced it, and the boost is back to normal. Engine performance is also back, fuel consumption is down. Cost me 140€.

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