theresaschulze1
Seat Mii Turbo Issues Check Engine Light and Power Loss
4 comment(s)
theresaschulze1 (Author)
Thanks for the quick reply! When you say "dodgy turbo actuator valve", are you referring to the actual actuator valve itself, or could it also be related to the pressure sensor giving false readings? Also, did you notice any specific whistling or hissing noises?
oskarberger2
Yep, I mean the actuator valve itself. I didn't check the pressure sensor, to be honest. Just took it to the shop. And yes, there was a definite whistling sound, especially under acceleration. A boost leak will definitely cause those symptoms. Get it checked out soon before it causes further damage to the turbo!
theresaschulze1 (Author)
Just wanted to close the loop. You were spot on! Turns out it was indeed the electrical bypass valve. Got it replaced, and the Mii is running like new again. The check engine light is gone, power is back, and no more weird noises. Cost me 250€ all in. Thanks a bunch for your help!
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oskarberger2
Whoa, sounds rough! I had a similar issue with my Seat Mii a while back. Check Engine Light, plus a really noticeable loss of power. The culprit? A dodgy turbo actuator valve. Have you checked that?