I have a 95 gsr with a chip p28 with a type r map in it. Ever since installed its been throwing a check engine light for the o2 sensor. I replace 2 of them already and still throwing a code. I dont know what to do I have a zex kit want to install but not when its throwing a code. Would it be bad to use the nitrous kit a 50 shot? its the kit when it activates at full throttle

 

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