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Nox Failure 700 1990

posted by  NJC on  Fri Dec 17 19:36 CST 2004
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last visit: Sun Jul 24 13:42 CST 2011
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The article Sstef points out is a good one.

If it's high NOx and HC and CO are fine, I'd suspect EGR or cat.

But, as per article, it can be O2 sensors too so it's worth getting it checked out to see if it is cycling within the proper range. The cat likes a proper ratio of Ox to function properly.

According to my 1997 test results, a "good reading" for my car (see sig) was 24ppm! That seems mighty low to me. It recorded something about 400ppm.
--
Norm Cook Vancouver BC; 1989 745T 200,000KM






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New Nox Failure [700][1990]
posted by  Jersey Guy  on Fri Dec 17 13:26 CST 2004 >


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