Secondary Air Injection Pump System Operation and Diagnosis – VW Passat Audi A4 A6 Mercedes Benz – YouTube

Here is a quick video on how a Secondary Air Injection System works and how you can diagnose problems within the system. How to diagnose problems with an air smog pump, how to fix a air pump, how does an air injection system work, what does the air smog pump do, what is the purpose of an air injection system, how does a combi valve work, what is a kombi valve, is the combi valve the same as an egr valve, whats the difference between a combi kombi valve and an egr valve, is the air injection system same as an egr system. P0491, P0492.

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