What does O2 Sensor CKT Slow Response (Bank 1 Sensor 2) mean?

Your vehicle has two - three 02 sensors , usually one on each side of the engine in the exhaust pipe and one just before the cat. converter. This is the case for a v-6 or v-8 egnine, A 4 - cylinder will have one screw into the manifold an another one screwed into the exhaust pipe just before the cat, converter. You engine will use more fuel if one of the 02 sensors are bad , they help to keep the fuel mixture balanced You should be able to pick one up at a auto parts store for around 60 - 8o- bucks,. There not hard to replace they just screw into the side of the exhaust pipe or manifold are the wires to them just plug in . You could save a few bucks if you did it yourself.