Mechanics

WHERE IS THE LOCATION OF THE AIR INJECTION CHECK VALVE

2000 BMW 328 • 178,000 miles

It is a small plastic check valve. I have located all the vacume lines I can find and cannot find the check valve. Can anyone help the car is 328ci. OBD codes are P1423 and P1421.
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Edling613
October 5, 2012.



It's eitehr the one on the air pipe to the exaust or it's on the air pump itself.

Hmac300
Oct 6, 2012.
Checked both could the codes mean something else? Already checked air pump control valve, and vacuum lines.

Tiny
Edling613
Oct 6, 2012.
If you weren't getting vacuum to operate teh valve then that could be it. We dont 'have any good drawings/placements of that part. All we have is a typical type thing with nothing for your car. BMW and Merecedes like to look you into their dealers so they only give very basic stuff.

Hmac300
Oct 6, 2012.