Hi, ive been having problems with my 2006 honda accord ex. My check engine light went on and so I ran a test with an obd2 scanner and codes p1034 and code p2243 pooped up. I went to autozone and bought a bosch upstream bank 1 sensor 1 o2 sensor. I replaced the old sensor with this new sensor and unplugged the battery to reset the car. I ran the test again and only code p2243 popped up and I looked this code up and it said "Reference Voltage Circuit/Open (Bank 1 Sensor 1)" so my question is what is this? And how to I fix this? Please help. And thank you in advance.