Ok today the car was throwing a 155 code repalced the 02 on the right side then a couple a minutes later it throws a 134 code the guy put it on scanner and he said now your left o2 is out , what could have caused this... what can i do to fix this, so it wont happen in future......

 

maybe the O2's wire is touching your y-pipe and getting burnt that would do it in pretty quick. hth

 

The P0155 was for the "heater circuit" in the passenger side pre-cat sensor.

P0134 is for "insufficient activity" on the drivers side pre-cat.

These are two different problems, and not necessarily related. Can't think of why replacing one would cause the other. Sounds like they are both "worn out". I'd just replace the drivers side and see what happens. Or you could swap the sensors left to right and see what happens to the code, but unless you have your own scanner that would be kind of awkward.

 

Anyways fixes prob Looks like they took my new o2 on the driveer side and rigged it with an older one, The last people that did my gears, I know Om sorry I had to take your time...
But anyways I bought 2 new ones... Thanks... It was weird for the other side to go out since I replaced the othe one 4 months ago... but it was not there when I took the other one off..