04 sebring 3.0L V6 OBD CODE P0155
 

code said upstream heated oxygen sensor heater circuit fault bank2 sensor1...what side would it be, when i called the auto parts store they asked if it was for left or right side. Not sure which it is.

Thanks for the help.

any suggestions on the best brand of O2 sensor to get?

Bank 1 is the bank with #1 cylinder in it. It's the rear bank. Bank 2 is the front bank.
Sensor 1 is the "upstream" sensor, "upstream" of the catalytic converter. Use a proper oxygen sensor socket with a slot for the wire.
Some people hereon the forum have had a bad experience with Bosch sensors. Others swear by the sensors you get from the Chrysler dealer.