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Thread: p0037 HELP!!!!!!!!

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    Default p0037 HELP!!!!!!!!

    I have 2007 mazda 3 2.0 Its been throwing a p0037 code for the o2. I replaced the o2 and I still have the CEL! I cant get rid of it. Please help!!! Where do I go from here.

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    Default Re: p0037 HELP!!!!!!!!

    Howdy! You may want to search for HO2S Heater Control Circuit Low (Bank 1 Sensor 2).

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