You trust that the shop did the job correctly. I wouldn't.
The code is for the exhaust valve solenoid, right?
I don't think the pigtail solved it, the code was cleared, and the next time you hit the RPM where the cam timing should change, it didn't, so you got a CEL.
ICarsoft is like an adjustable wrench. Works, sort of, on all bolts. Not as good as a quality box end wrench. Not good enough for your need right now.
You need to put the car on VIDA and RUN THE STEPS to troubleshoot this.
Or pay someone with VIDA.
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