96 Contour SE V6 MTX, 125,000 mi, throwing 0133 CKT Sensor slow and 0430 Catalyst below efficiency bank 2.
Last month, it gave a 0174 and 0430. One of the hoses under the TB wasn't connected, so I cleaned the TB and pluged it in and that got rid of the 174. The 430 came back.
I occasionally get the engine speed dependent twangy popping noise that makes me think there is a leak in the exhaust manifold somewhere. Is that even possible? Would that throw a 430? Can I just JB weld it?
The car is running great, it got great mileage evan as I set a personal best time going to Lansing.

96 Ford Contour SE MTX, SVT exhaust, KKM intake, SP Motorsports slotted rotors, KVR pads, SP5000s -Stereo sucks