A p0057 code is related to the heater circuit voltage for the bank 2 sensor 2 Oxygen sensor. The PCM (computer) controls a heating element inside the O2 sensor that helps the sensor reach a high temp in order for the O2 to start working faster. It seems this circuit is not working, therefor the PCM alerts us by displaying a trouble code. In most cases, replacing the O2 repairs this code.
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