P0141 code and another question

WhiteSnakeEyes

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ok..just put the new motor in the car and had the check engine light on...put MIL eliminators on thinking that was it...but it still came on, so run it by the autozone and had them pull the code and it's P0141 "O2 sensor, bank 1 sensor 2". What exactly is the cause and how do i fix it? Is it the fronts or rears?

Also...the pipes coming from the headers (i assume for re-circulation) go into a T and go into a sensor or small air pump...is there suppose to be another hose coming off the other end of that pump going somewhere..b/c on mine it's just open. Didn't know if that could cause that code to come up.
 

MikeW

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P0141 Downstream Heated Oxygen Sensor Heater circuit fault - Bank No. 1.


rear 02

My '98 got a code like that after a BBK catted hpipe install. I replaced the 02 and would still get the damn code. My fix was a MIL on that one side and the CEL has not been on since.

Good luck..
 

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