I have a 2004 Dodge Intrepid 3.5L high output. I had codes for both o2 sensors bank 2. I replaced booth sensors. The one before the catalytic converter is a universal one (had to cut wires and re use the plug) the rear one is OEM. I am now getting the p0175 code. It Idles rough and smooths out once rpm are brought up off idle. Any suggestions?