Failed Emission Test

Ti Kan ti at
Tue Jul 3 14:45:29 EDT 2001

A completely dead O2 sensor may log a trouble code, but one that is
sluggish or inaccurate won't.  For example, a sensor that reads low
will fool the ECU into thinking that the mixture is too lean, hence
the ECU will richen the mixture to compensate.  With the richer mixture,
you will have poor emissions.

01 S4 2.7 biturbo quattro
84 5000S 2.1 turbo
80 4000 2.0
    ///  Ti Kan                Vorsprung durch Technik
   ///   AMB Research Laboratories, Sunnyvale, CA. USA
  ///    ti at

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