P0491 Diagnose and Repair for Enhanced Fuel Economy and Emissions Compliance

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P0491 Secondary Air Injection System, Bank 1 - Insufficient Flow. P0492 Secondary Air Injection System, Bank 2 - Insufficient Flow. P0491 code means there is a problem on the side of the engine which contains cylinder #1 due to a bad air inlet, faulty wires, relay, pump, or fuse. If the PCM detects that the catalytic converter is not being heated up sufficiently to become self-sustaining in the period specified by the ... The description is "Secondary Air Injection System Insufficient Flow Bank 1 and same for Bank 2. Any one else seen these before. Could spirited ... P0491 Secondary Air Injection System Insufficient Flow. Stumped. My VW CC 2010 is having a check engine light with the code P0491 which ... The dual codes indicate a system failure. A system failure can be due to one of the following: 1) Air pump failure - This is a fairly common ... Those codes are for the following: P0491 - Secondary air injection system bank 1. Air mass too low P010F - Mass airflow system (Bank 1 + Bank2) :: Rationality ... P0491. Says its the secondary air injection system. I went to my friends shop here in pittsburgh to check it then we cleared it. Car is running fine but it may ... It's not serious. Secondary air injection is used to warm up the catalytic converters during a cold start. You'll have to get it diagnosed to ... Cold is a relative term. The engine coolant temperature needs to be under 104F/40C otherwise the SAP pump WILL NOT be commanded on. If you have ...
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