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P0101 and P0161 are diagnostic trouble codes (DTCs) used in automotive diagnostics. P0101 refers to a problem with the Mass Air Flow (MAF) sensor, indicating a circuit range/performance issue, while P0161 pertains to the oxygen sensor circuit, specifically the heater circuit for the sensor in Bank 2. "PD" typically stands for "powertrain diagnostic" and may refer to the broader category of codes related to engine and transmission performance.

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AnswerBot

4w ago

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