I recently purchased a 97 monte carlo with a 3.1L engine for a winter car. when i first got it it had a code that was egr. i fixed the egr, that car sat for a couple of weeks, and now i keep getting a po141 o2 sensor heater circuit malfunction bank1 sensor 2. what does this mean? could the two thing be related? where is bank 1 sensor 2? HELP!!!!

o-2 senor is not that hard of a job.the 0-2's and there usuly are in front of cat.

Sensor 2 is after the cat.

besides a bad sensor, would there be any other reason for this code to activate? Like would a plugged converter make this happen? someone told me that because I had a previous egr valve code and now a o2 code that could be because of a plugged converter.

No, the this is the code for the heater circuit portion of the o2 sensor function, check the fuses first of course and the harness to the sensor.

what fuse would I check for an o2 sensor?

Check the wiring diagrams at autozone.com, repair guides.

i erased the code and probably drove it about 300 miles before it came back on. now it also has an egr insufficient flow code on too-which i had previously replaced the egr valve. are these two codes related to some other problem?