my engine threw the code p0141 which read out to be heater circut malfunction and it turns out that is the o2 sensor from bank 1 sensor 2 which o2 sensor is it that needs to be replaced

 

B1 S2 is the post cat sensor, but if its a heater circuit code the ground for the sensor is likely the cause. check for water intrusion to the harness and corrosion, even a melted harness. the other good thing to do is determine the ground wire for the heater circuit and add a piece of wire and ground it on the chassis for a better ground.

 

thanks for the information i am going to have to check it out and see thanks