Reviving this older thread....
This is C105 junction connector. It is a splice connection for several different circuits. We found it is the cause of his P0135 code in this thread:
www.odyclub.com
This is C105 junction connector. It is a splice connection for several different circuits. We found it is the cause of his P0135 code in this thread:

evap canister purge valve and primary O2 sensor
2002 ody. error code P0135 (low resistance of heating element). According to wiring diagram, Evap Canister Purge Valve (ECPV), located on top of throttle body, is connected with Pirmary O2 sensor (contact #3). Does ECPV affect O2 heater element (and error codes)? I tested ECPV and it was...