Engine Check light turned on. on 1998 Volvo S70

Advantage auto parts ran diagnostic on ODII. Code showed Po410 ... secondary air injector. what the heck does this mean?

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2 answers
This system is known for having issues with the air pump check valve, and when it fails it allows moisture to contaminate the air pump too, so it's likely both will need replacement. You'll want to take this to a Volvo shop, they will be very familiar with this issue.
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There is an article in the Auto Repair Encyclopedia about the OBD II Code P0410. Please go to the following link http://repairpal.com/obd-ii-code-p0410