Chipmunks made their way into the engine compartment and chewed the wiring that feeds the O2 sensor. Mechanic tested and said it was Bank 1, Sensor 2 affected but he never looked under the hood because he was too busy yesterday. When I got home, we looked inside and found the damaged wiring. Is it possible to splice or replace the broken parts, or do we need to replace the sensor? I stopped at an auto parts store today and the fellow sold me some wire, but I'm not sure it can be done. :-( Those darn chipmunks also chewed through a section of black tubing which I fixed with some electrical tape, but I guess it has nothing to do with the O2 sensor?