here's good one, but you need to check.
Like HITMANinMI said
Make sure they connected the O2 to the wire harness.
It's happened before that someone had a part changed but they didn't connect it.
1996 2.5LT V6 Contour ATX
My Tour+help/info pics
E0 rims, Gutted Pre-Cats,CTA Custom Exhaust & Intake, Diablo Chip.