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Anyone have any idea what this could be due to?

engine code is coming up as p1290, and car will not go beyond 4K RPM. Even manually shifting to a lower gear, the car limits itself to 4K and will not go a tick past it. Completely cuts power. Only drove a few miles home when noticing this, so a CEL was not illuminated but the code was stored.

Looked the code up and it seems to be a generic code that is basically only detailed when using a brand-specific scanner. Not finding much info outside of some BMW forums saying it’s related to a wastegate issue and some Honda posts linking it to a cylinder head coolant sensor.
 
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