P0491 Diagnose and Resolve for Optimal Engine Function and Emissions

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'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 ... 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 ... Ffs love the car… but these issues lol!! Left engine mount leaking needs replacement, front controll arms bushings torn, then P0491 air ... P0491 Secondary Air Injection System Insufficient Flow. Stumped. My VW CC 2010 is having a check engine light with the code P0491 which ... The car will need to be in closed loop or hot for the 02 sensors to read the air input correctly. Error code P0491 which to my understanding is related to the secondary air injection system on bank 1(whatever it means, I guess cylinder 1) Get P0491 OBD-II code: Secondary air injection system insufficient flow. Know common triggers, repairs needed, and find RepairPal certified shops for ... Bank 1 is the drivers side, check the fuses for the secondary air injection pumps. There are two 40a maxi fuses located in the underhood fuse ... It read p0491. That apparently has something to do with the secondary air injection system. I think that has something to do with the n51?