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i recently replaced myO2 sensor (down stream)??a new code comes up po141 on 2003 Mitsubishi Eclipse

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
is this an expensive fix can i still drive my car? i have smoke come out from the tail pipe and poor gas mileage.help!
(1) Answer
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this code is related to the heater ircuit on b1 s2 o2 sensor you either got a bad sensor or you broke a heater signal wire. try another sensor if that doesn't work look for bad wire or connection
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