I recently got a code for the downstream o2 sensor, went to go change it and noticed the wires were damaged... anyways i went ahead and changed the o2 sensor and repaired the wires (cut, strip, crimp, heat shrink), cleared the codes and drove off. after 20 minutes of driving the light came back on and i have the same code plus another two saying shortage and the other said high voltage (cant remember exactly)... why could this be? can i not repair the wires? do i need a new full harness? input would be great as i need to emissions test my car asap!! thanks!!