P0491 Diagnose and Repair the Secondary Air Injection System

P0491 Secondary Air Injection System Insufficient Flow. Stumped. My VW CC 2010 is having a check engine light with the code P0491 which ... I have a p0491 issue (Secondary Air Injection System Insufficient Flow Bank 1). Car runs fine, but I was curious about. Code P0491 Secondary Air Injection System (Right Bank). Subscribe. Feb 3, 2006 | 10:03 PM. i might try to see if my MAF is dirty... this is the best info i think i have recieved yet. ... period during which the AIR pump is energized is ... 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 ... It is a round valve with a small vacuum hose attached at the top rear. Remove the OEM diverter valve, and set it aside. The new parts (Autozone ... I'm getting code P0491–Secondary Air Injection System Insufficient Flow Bank 1. I've cleared it twice and it keeps coming back. Does anyone know ... Q7 MK 1 Discussion - P0491 CODE help - Hey all, 2015 Q7, CODE P0491 Secondary Air Injection System, Insufficient flow Bank 1 Anyone else ... This is a known issue with the 3.0T. It's emissions an emissions issue, no damage to your car will happen while driving with the CEL. The data shows there is no air mass moving across the sensor when system testing is activated. Whether that means the sensor is crap or the valve is stuck ...