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During a trip, the Powertrain Control Module (PCM) monitors various emission-related components to ensure they are functioning properly. It collects data from sensors such as the oxygen sensors, Mass Air Flow (MAF) sensor, and catalytic converter to assess the vehicle's emissions performance. The PCM uses this data to make real-time adjustments to the air-fuel mixture and ignition timing, optimizing combustion and reducing harmful emissions. If any components are detected to be malfunctioning, the PCM can trigger diagnostic trouble codes (DTCs) to alert the driver and facilitate repairs.

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1mo ago

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