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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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What is code PO401 on 2003 Hyundai?
PO401 indicates an abnormal EGR flow.
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exhaust gas recirculation flow insuffcent detected
What is wrong when yo get a po401 code?
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Why does the engine light keep coming on indicating code PO401 in a 2000 Mazda protege?
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