error indicating in Check engine knock sensor Impreza GL 1.8 1996

[Victor Matheus]

Hi! I need help! I have a Subaru Impreza gc ej18 1996 and usually when I reach a speed of 80km/h the check engine light on the dashboard lights up, when connecting the green and black cables the light on the panel is indicated with the Knock sensor error, is this normal? There is no Knock sensor on my engine and I also didn't find a cable to connect