I have a 05 civic si hatch and it had an exhaust leak and started missing and popping out the exhaust pipe so check engine light came on and it says po134 bank one sensor and cylinder misfire 1 2 & 3 misfire just started when I got the leak anyone had this problem... thanks

 

wecome to the forum. When was the last time you had the si tuned? Also might be a good idea to get he exhaust pipe fixed or replaced. carbon monoxide in the eng compt may get into the pass cabin.