engine check light turned on

where is the secondary injection pump at on a 2001 A4 1.8 engine? any one got a picture to post? Hunter

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Looking at the Bentley CD: facing the open engine compartment from the front bumper, I believe it is located on the left side. It's intake comes from the air cleaner box, so it shouldn't be too hard to find.
/daytripper '00 s4 6spd
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AFAIK secondary air pump should be towards the front of the engine compartment (air filter side) down real low. accessed by removing that lower engine cover or splashguard.
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