P0545 A/C Clutch Relay Circ
The reason they are messing it up is because that code is surrounded by exhaust CEL's. http://dodgeforum.com/forum/1st-gen-...ine-light.html
As for your O2 sensors, make sure there is no brake fluid in or on the harnesses for them. However 200k miles, well you might want to replace them. I suggest Denso from www.rockauto.com
because Denso makes the OEM ones.