WHERE IS THE LOCATION OF THE AIR INJECTION CHECK VALVE

  • Tiny
  • edling613
  • 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 Answers

  • Tiny
  • hmac300
  • Expert
  • 42,060 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

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
  • Expert
  • 42,060 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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