Skoda Fabia engine issues

I'm having a nightmare with my 2019 Skoda Fabia with Gasoline engine. It's done 91543 km, and the check engine light's on. I've noticed a big drop in engine power and the response is terrible. There's also a weird whistling noise that turns into a loud hissing when I put my foot down. Sometimes, the engine even cuts out when idling, and my fuel consumption has gone through the roof! I'm guessing it's something to do with the boost pressure actuator fault, maybe even a faulty electrical bypass valve. Any ideas?

4 comment(s)

That sounds like a textbook boost leak. The whistling and hissing are dead giveaways. Did the check engine light throw up any specific error codes? Give all the hoses connected to your turbo system a once-over for cracks or loose connections. A dodgy turbo wastegate could also be the culprit.

Error code P0299 came up. You mentioned the turbo wastegate; could you explain that a bit more? I'm not really a car expert.

Error code P0299 points to underboost, which backs up the boost leak theory. The turbo wastegate is a valve that regulates the boost pressure from the turbocharger. If it's playing up (maybe stuck open because of the actuator fault), it can cause boost pressure loss. It's probably the actuator fault. With those symptoms and the error code, I'd get it looked at by a garage. Sounds like a turbo system issue.

I had the electrical bypass valve swapped out. Set me back 250€. The car's back to its old self! Thanks for the pointers; it helped me get my head around the problem.

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