2002 Honda Stream Rattling sound

Hi every one,
I found the problem that cause the rattling sound. My O2 sensor was bad that is the one before the caterlist and I brought a bash brand the type you must cut and splice for it to fit my car, any way it did not work, the Eng. Check light came back and was running rich real rich, start to burn 190 k/m per full tank, so I put in back my old sensor until get the correct one its now three day now and I don't here the noise any more, that mean it was the incorrect sensor that cause the noise in the fuel injectors.