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What is the meaning of OBD-II code P0411, and what are the possible causes and how to solve this issue?
OBD-II code P0411 refers to a fault with the Secondary Air Injection (SAI) system, specifically an incorrect flow detected in the system. The possible causes of this code are: A failing secondary air injection pump A clogged secondary air injection passage A damaged wiring in the SAI system A damaged engine management system To diagnose the issue, a mechanic may use an OBD-II scanner to retrieve the code and then perform a visual inspection of the SAI system components, passages, and wiring. To fix the issue, the mechanic may replace the faulty component, clean the SAI passages, or repair any damaged wiring. In some cases, clearing the code and resetting the vehicle's computer may resolve the issue if it was a temporary fault.
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