Differences in primary and secondary o2 sensor. . .
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Joined: Jan 2003
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From: Flagstaff, NAU, USA
Differences in primary and secondary o2 sensor. . .
just wondering, what are the differences of a primary and secondary o2 sensor. i searched but there were mixed thoughts, so let this be the definitive post. 
mods, please move this to eg+/del dol please.
