1997 BMW 528 Check Engine Light Codes

1997 BMW 528
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JOHNBMW528I
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Engine Performance problem
1997 BMW 528 6 cyl Two Wheel Drive 187000 miles

I have a 1997 BMW 528i which I just purchased and after driving approximatly 200 mile the check engine light went on. Auto zone checked it and said it was a P1421 and P1423 code. Where do I find out what this means? Do you know what the problem Could be?
Oct 21, 2009 at 8:46 AM
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DOCHAGERTY
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Look to the left of the screen, do you see the trouble code table under where it says popular site links, go there for your definition of the trouble codes. Knowing those cars like I do, the issue is probably the little vacuum hose to the secondary air valve has cracked and will require replacement. It can be seen at the front of the right side of the motor just forward of the exhaust manifold, the small round thing with the black hose (vacuum line) running into it.
Oct 22, 2009 at 12:24 AM
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