2011 Cascadia, DD13 giving code - ENG 1, SPN 641 FMI 5. 760k miles.
Google has me believing it's an open circuit on the wastegate control actuator. I assume, this is the wire off the turbo?
So far, the truck is still running strong, but I'm not a fan of both amber lights dancing on the dash. All help & tips on a repair would be greatly appreciated. Thanks.