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Originally Posted by Dale_K
How does the secondary air injection system interact with the evap system? I guess I don't know what sets the air injection codes.
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I don't know of any interaction with SAI and EVAP systems -- they do two completely different functions for different reason. The SAI provides fresh air to the exhaust manifold to start the oxidation process of the HCs while waiting for the cat converter to lite up. Works when the engine is cold on startup and sometimes kicks in when the car has been idling for a while and the O2 sensor cools and needs to be reheated.
Here's a partial list of SAI DTCs (for DME 7.8).
Regards,
paul...