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P1411 - secondary air injection system flow too low Bank 2.
P1423 - secondary air injection system flow too low Bank 1.
Check vacuum hoses to combi valves ,
most common split air injection pump which is riveted with aluminum rivets,ck rivets if they coming out ,pump doesn't build enough pressure.
In this case take pump out and put bolts instead of rivets all around pump case.Repl. all rivets not only broken one.Bolts sold at HomeDepot , just find a needed size.
you will need to pull the radio out and get the serial number off the back of the radio unit. then call up your local VW/AUDI repair shop or dealer and ask them to look up the code for you. i had to do this last week with my VW jetta.
hi mates... first of all try to see your whater pump working(with two whires...old fashion way), if that works, u should change the thermostat and Yes for lakramer (the malfunction must be related just to let u know u may blow your engine if not fixed)