ghost steering issue

[xshatterstar]

So I was cruising around and suddenly my steering became stiff like im driving in the mud. I scanned the car and it shows Code u0415. Dealer and a shop i brought the car into can't figure out for the love of god why my steering is like that. After a while A/C codes also came recirculation damper motor mechanical fault and short to ground i think from the actuator. I brought it to the dealer again to fix the A/C issue and after they fixed it, for some reason code u0415 is gone but the A/C codes remained as well as the stiff steering. I dont know what else to do. Please help

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[xshatterstar]

PS. I have a new battery and also had the dealer change my wheel speed sensors. The shop I brought it into also cleaned everything and checked wirings as well as the wheel hub but they said there's nothing wrong.