ECU code 43 help?

[Tech5]

O2 sensor, a short or replace the ecu , if you have a JDM ecu they only use a 1 wire o2 sensor, or if your ecu is looking for a 4 wire but you have a 3 wire o2 sensor signal , or someone tried to wire a 1 wire sensor harness too a 4 wire o2 sensor either or check sensor by ohming it out, an checking for resistence, an checking your output signal wire,ground, 12v battery , if everything is good then check your ecu