Contour Enthusiasts Group Archives Forums Modifications Duratec Maintenance Many codes found, now where to start ?

Have fun, gee thanks !!! Well I did some looking and fuse 13 wan in fact blown. I replaced it and it blew again. I traced the first two upstream O2 sensors and didn't notice any wiring problems ( well I traced them into a loom ! ). Haven't checked the last two, but I doubt its a sensor itself. Any ideas where to look to find this ? Known problem areas ??