I am trying to put together my car after fixing a head gasket. I don't recall removing this sensor, but can't seem to identify it or find where it plugs in. Hope someone can help.

 

It is a junction connector (C103). It is used to split/distribute power (via the Yel/Blk wires) and ground (via the Grn/Blk wires)
Terminals grouped together are connected by the same bus bar.

Yel/Blk wires distribute power to the following:

• Individual fuel injectors
• IAC valve
• PCM or ECM

Grn/Blk wires distribute PCM/ECM sensor ground signals to the following:

• Fuel Tank Pressure sensor
• TP sensor
• ECT sensor
• IAT sensor
• Primary HO2S
• Secondary HO2S
• EGR valve lift sensor

 

Thanks for explaining that!! I really was getting frustrated to identify and find its matching connection. I didn't realize it was already connected inside the bus. I see the clip it attaches to. Is there a link where I can find photos like the one you showed me? those are great

Thanks again!!!