I recently had my catalytic converter replaced at mineke because it was completely clogged with soot and was robbing power. Mineke couldn't get the old O2 sensor out so installed a new bosch O2 sensor for my car. Kept throwing codes for the o2 sensor. Have replaced it with model specific O2 sensor once from rockauto and then genuine part from Kia. Both times still throws codes for heater. If I backprobe the O2 sensor connector when disconnected, I get .45v on the sensor lines, and only 10v to the heater. one side of the heater circuit if tested with body ground will give 13.4v and the other side will only give 3v.
From my understanding the 3v side is the heater ground modulated b
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