mutley999 0 Posted October 1, 2020 Report Share Posted October 1, 2020 (edited) Hi all, I now own a Golf Mk4 V6 4motion 2003 year Car drives nice and solid but every few hundred miles the engine MIL illuminates Vagcom pulls up P0411 and P1411 I understand these relate to the secondary air injection system (SAI)? After a read round it seems to point to either the pump not working or hoses split?? Could someone help point me in the right direction please, where is the pump located? how to test it? Can it be removed? it is really required? I know a few questions but trying to get a understanding of what may be my best route to take to stop the fault returning Thanks all Edited October 21, 2020 by mutley999 Link to post Share on other sites
mutley999 0 Posted October 21, 2020 Author Report Share Posted October 21, 2020 Any one there? Any one help? Link to post Share on other sites
Philly-R6 28 Posted October 26, 2020 Report Share Posted October 26, 2020 Hi, I stumbled across this link - it may shed some light for you? http://www.vaglinks.com/Docs/Audi/C5/4.2/BentleyPublishers.com_Audi_A6_C5_4.2L_Secondary_Air_Injection_Maintenance.pdf and a layout picture on Vortex for the AFP engine: https://forums.vwvortex.com/showthread.php?4270565-mk4-sai-vac-line-diagram-or-picture&p=56023102&viewfull=1#post56023102 Have fun! Link to post Share on other sites
mutley999 0 Posted November 27, 2020 Author Report Share Posted November 27, 2020 Thanks Philly-R6 Link to post Share on other sites
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