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Where is the location of the air injection check valve

Tiny
EDLING613
  • MEMBER
  • 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.
Friday, October 5th, 2012 AT 10:08 PM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It's eitehr the one on the air pipe to the exaust or it's on the air pump itself.
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Saturday, October 6th, 2012 AT 12:04 AM
Tiny
EDLING613
  • MEMBER
  • 2 POSTS
Checked both could the codes mean something else? Already checked air pump control valve, and vacuum lines.
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Saturday, October 6th, 2012 AT 8:19 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
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.
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Saturday, October 6th, 2012 AT 9:20 PM

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