Mike G Posted July 24, 2016 Report Share Posted July 24, 2016 My check engine light came on today and it read a fault code of POO30 on my reader. Before I reset it I noted it said heater circuit bank1 sensor 1 So I know this is one of the four oxygen sesors... but does any one know which one !!! ??? Mike Link to comment Share on other sites More sharing options...
RickLS7 Posted July 24, 2016 Report Share Posted July 24, 2016 From the back of the car, LH side is bank 1 and RH is bank 2. Sensor 1 is before the cat, sensor 2 post cat. I would replace both sensor 1 & 2 if they look old as the other will probably fail soon. Link to comment Share on other sites More sharing options...
Mike G Posted July 24, 2016 Author Report Share Posted July 24, 2016 1 hour ago, RickLS7 said: From the back of the car, LH side is bank 1 and RH is bank 2. Sensor 1 is before the cat, sensor 2 post cat. I would replace both sensor 1 & 2 if they look old as the other will probably fail soon. Thank you for that..... its exactly the info I was looking for Mike Link to comment Share on other sites More sharing options...
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