Prety sure this is correct. O2 sensor was changed 6 month ago. The foult is intermitent. If i can reset the light and it takes few weeks for it to come back, means something goes wrong for a short period of time and desapears. What can this be though ? How can I trace the wire?

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Dmitry
90' 300CE
17" Intra Signums
Brulen mufler
Euro Headlights/Clear Blinkers
White gouges (made my own)