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Q:

What does code P0141 "post cat 02 sensor heater performance fault" mean on 2000 Chevrolet Cavalier

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
This is what came back from my engine light coming on and being diagnosed.
(1) Answer
for the po141.
Replace oxygen sensor (cannot repair open or short that occurs internally to sensor).
Repair short or open or high resistance in wiring harness or harness connectors.