What is the wire connected to the cat on a 04.5 LLY DMAX
 

I'm planning to install a new exhaust system on my 04.5 LLY DMAX. There is a wire connected to what looks like an O2 sensor. Is this an O2 sensor or the sensor that measures the EGT's

Is you 04.5 a Calli truck? My 04.5 had no wires attached to the exhaust anywhere.

Do you have an aftermarket EGT probe? If so, that may be it. Post a picture of it. That may help to determine what it is.

yeah an egt probe was the only thing that i could think of, why someone would put it there though is beyond me

False alarm: Have been workin on too many gas rides. Appreciatethe feed back. Keep smokin