Michael Pardee wrote:
> The question of whether an O2 sensor can be bad enough to cause drivability
> or fuel economy problems without triggering OBDII codes has another data
> point.
>
> In the alt.autos.subaru forum somebody asked for help sorting out very
> troublesome hesitation after slowing in a 2006 Outback. A respondent had the
> same problem in his car, and pressured the dealer to do *something*! The
> dealer replaced the O2 sensor (front one, I presume) in spite of lack of
> diagnostic codes and the symptom disappeared.
>
> Mike
>
>
my experience is yes, it can definitely scratch that itch. with cheapo
aftermarket sensors, my '89, which has a slight tendency to hesitiation
anyway, is /way/ worse. no codes. but when i use a new oem sensor,
that problem all but disappears.