I Third Secondary Air Pump
If you are familiar with it, Cold starts it will run around 90 seconds, then turn off. Usually doesn't come on if you turn car off and restart or if engine is warm.
If you are hearing on top of the pump itself, a very high pitch wine, then it is the sealed bearing inside the pump (It's another IMSB - Ohh know!!)
It can be fixed by opening up pump, pulling out bearing and shooting grease into it.
Mine has been quite for a couple years now.
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2002 S - old school third pedal
Seal Grey
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