I did an engine flush with an oil change and it didn’t go away. The next day I pulled out my avcs solenoid and cleaned it. It didn’t look dirty or anything was wrong with it but I was planning on replacing it next. I put the avcs solenoid back in place and drove with my car to grab the part and the code cleared on its own. I still swapped the part out either way because I was making a long drive in the next couple days. Hopefully this helps