un-plugged blue cable

I was installing my armor today, when I noticed I had an unplugged wire above my tranny. I looked everywhere and could not find where it came unplugged from. The other side of the tranny has a similar plug, that's plugged into a blue one as well. Can someone help me I have no check engine light and my truck runs okay. Except the catalytic makes noise. All o2 sensors are connected. I just can't find where in the world this cable belongs.

 

That should be for the transfer case position sensor I believe.

 

I have the same connector hanging off to the side of my transmission. Never found anything for it to connect to, so I wouldnt worry too much about it

 

-Mike "idaknow"

 

Are you guys auto or manual transmissions? I wonder if it is for one or the other?

 

Yea all schematics show Transfercase L4 Position sensor.

 

sorry it took so long for me to reply. i went up to shepherds lake here in Utah and my truck finally gave me a code! it was code P0420 P0420P

 

Catalyst System Below Threshold

 

Your oxygen sensors are ok, save for an exhaust leak, you need bank 1 catalytic converter to fix that code. Likely P0430 bank2 is on its way as well.

 

420 is caused by an exhaust leak. Get a new gasket for the flange. Get new bolts as well. They usually twist and break.

 

should I just invest in a new racing manifold and new catalytic? or should i just replace the whole exhaust system?