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o2 sensor

  1. Fixing my CEL P0057

    General Discussion
    SO, My car has a 3rd cat, muffler and res delete with new 2.5" pipe from the headers back and even before that when i just had the muffler and cat delete i still had the same cel. I ran the code and got P0057 Heater control circuit low bank 2 sensor 2 now what am i to do here to get rid of the...
  2. o2 sensor help

    General Discussion
    I’m thinking about getting some headers for my 2002 IS but i don’t know anything about o2 sims or how the sensors even work, if i were to install the headers without a sim will the car even turn on? Or will it turn on but my mpg will go down a lot and i’ll get a CEL light, any help would be...
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