In this video we I show you how the secondary air injection system works. This system works the same in most Volkswagen and Audi vehicles. Vehicle used is a 1999 VW Jetta Mk4 with a 2.0 gasoline engine. If you have a p0410 or a p0411 this video will show you how to isolate the problem and find out which part is at fault. If you found something in this video you can use, please give me a LIKE! Subscribe to my channel for a new video at least once a week.

Tools used: Autel Maxisys Scantool (useful but not necessary), jumper wires for relay testing, Mityvac Silverline vacuum pump (cheaper ones work too).

Test leads: [ Ссылка ]
Vacuum pump: [ Ссылка ]
Scan tool: [ Ссылка ]

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