more than likely.
Ran around for about two days before I got the heater circuit MIL. Took me another two days to finally convince myself that the O2 sensor had somehow managed to blow the heater circuit. Still stumped as to how it could manage to do so on a fused circuit and not so much as tickle the damned fuse. But whatever lesson learned bite the bullet and go OEM or look harder at the local yards.
Hey you back in the area yet?