Hello my name is***** do not rate until we are finished. I look forward to assisting and am very sorry to hear that you are having this problem. I want to warn you that it is possible you will need to replace a part in order to fix this. There are a few different things that can cause this and a couple different parts so we would need to troubleshoot to find out for sure. Have you replaced anything else recently? Did you get an extended warranty?
You can sometimes still get parts on sites like eBay and Amazon. If the board was causing this it should happen for all not just the Y, however a failing drum can sometimes show a toner error like this. Here is a disassemble guide so you can check inside the machine: