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P0492

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P0492 OBD-II Trouble Code: Secondary Air Injection System Insufficient Flow Bank
P0492 means there is a problem with the secondary air injection system, often due to intake leaks or faulty one-way check valves.

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Question
Two mechanics have not been able to repair misfire.
Hi there. Check the intake for a possible vacuum leak around the cylinder 4. If there is no vacuum leak around the cylinder number 4, then there could be a burned valve. Check the compression on all of the cylinders...

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