No start and P0335

Had code for bank 1 sensor 2. Changed o2 sensor under front of motor by the passenger side and now it wont start. I checked the fuses inside the engine and in the vehicle. If you turn the key no crank or nothing all the lights and radio work fine. The car ws running great before changed the o2 sensor. But know. Nothing. I tried to jump it but nothing is happeneing. I even unpluged the new sensor and tried to start it but nothing. NOW it tells me P0335 crankshaft circuit A malfunction. ( How can changing 1 damn O2 sensor) cause this.I just want it to start. Please help