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Still confused on the timeline, because your initial post made it sound like your problems cropped up yesterday, so you cleaned the solenoids and now you have issues.
But when did you replace the valve cover relative to the steps above?
We're certain these codes are persistent? What happens if you clear the codes, and try again? Which ones come back?
Seems super unlikely that the crank sensor went out, that'd be a hell of a coincidence. Unless you bumped/broke the connector for it or something. Worth inspecting for sure. I'd be retracing your steps and seeing if you missed something else small.
Maybe re-inspect and swap the solenoids if you can. If the main codes you're getting are more closely related to one solenoid circuit, that code should follow wherever you place the solenoid, if the solenoid is the problem.
Not sure if DIY junkyards are around near you, but where I'm at I can pull used solenoids for pretty cheap. Can be handy for troubleshooting. Also beware of aftermarket solenoids, I tried some one time because I couldn't find genuines, and I ended up getting codes because of it.
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