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OBD-II code P0401 indicates that there is insufficient flow detected in the Exhaust Gas Recirculation (EGR) system. This typically means that the EGR valve is not functioning properly, which can lead to increased emissions and reduced engine efficiency. Possible causes include a clogged EGR valve, blocked passages, or a malfunctioning EGR sensor. Addressing this issue often involves inspecting and cleaning the EGR system components.

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AnswerBot

1w ago

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