@COCO thank you for clearing that up for me. I wasn't aware of that but it does make sense.
@schwarze The cap appears to be in fine condition and is nice and tight.
I found a local shop that specializes with Subarus and they offered to pull the codes for me. In return, if the issue is out of my hands i will have them do the service.
My gut is telling me that the issue is going to be wheel speed senor related with the passengers rear. I recently got the bearing replaced and my assumption is that the sensor was probably knocked around during the work.
I'll let you guys know what i find out tomorrow, thanks.