O2 Sensor

I just checked my CSC light, I had three codes P0141 Oxygen Snsor Heator Circuit Malfunction (post-converter sensor, left bank), appeared twice and code P0161 Oxygen Sensor Heator Circuit Malfunction(post-converter sensor, right bank). Now if i erase the codes and they do not re-appear in a few weeks our so does that mean that they were a fluke and there was nothing to worry about? If not what would be the best way to slve the problem, replace the sensor, a bad connetion? Thanks ahead of time. {{97 5.7 z71 auto}}

I just checked my CSC light, I had three codes P0141 Oxygen Snsor Heator Circuit Malfunction (post-converter sensor, left bank), appeared twice and code P0161 Oxygen Sensor Heator Circuit Malfunction(post-converter sensor, right bank). Now if i erase the codes and they do not re-appear in a few weeks our so does that mean that they were a fluke and there was nothing to worry about? If not what would be the best way to slve the problem, replace the sensor, a bad connetion? Thanks ahead of time. {{97 5.7 z71 auto}}

Wiring and plugin and grounds and fuses can cause these code.
You need a good repair manual that has the repair flow charts and wiring diagrams for the codes and go threw the repair flow chart.
Good Luck
MT