FYI,

来源: 于 2010-05-11 20:55:52 [旧帖] [给我悄悄话] 本文已被阅读：次

This is what I found online. Also link is attached.

Air Fuel Ratio (A/F) Sensor, (sensor 1, located in the exhaust pipe ahead of the convertor) Note: This IS NOT an "Oxygen Sensor" in the standard sense, and cannot be replaced with some cheap after-market (ie: Bosch) Oxygen sensor.

LINK:
http://www.elementownersclub.com/forums/showthread.php?t=48690