what can cause my exhaust overheat heat light to come on. can someone help me please.

Clogged cats

i have no cats i have rb header and pre-silencer

bad sensor..

if you deleted your cats...disconnect the sensor

wher is the sensor located

By the diagram, which is not real definitive, it looks like it on the passenger side underneath. Looks like it's a red/yellow wire. Unless it comes on all the time, I wouldn't even worry about it. Mine comes on every now and then, usually just flashes and goes back off.

typically underneath the passenger carpet...

just unplug the connector..