O2 sensors p1155

[hassler98]

So i just replaced my o2 sensors and i still have a p1155 code now i do have after market headers and the bank 2 sensor two could be loose maybe as i didnt have that much space but what else could be the issue

[MauiM3Mania]

Moved from the General BMW Discussion sub-forum.

[shadowpuck]

assuming this is a 01 330 as listed in your profile. you haven't told us anything about the vehicle so i'm kinda guessing here.

have anything other than p codes? they often aren't much help on a bmw.
you mention headers - which ones and do you have a tune or anything? what other work have you done recently? 1155 seems possibly related to heater circuit function if you believe the p code...which, i'd be dubious. it's complaining about the o2 heater - if i understand that code correctly....

that said - check wiring, make sure it isn't pinched any place. make sure connections are secure....

you could do basic circuit tests with a test light or substituted load - especially if you have a tool capable of controlling the circuit...