That was exactly what happened to my best buddy last year. The 94-95 accord have a collector which the sensor is located at. The cat u bought is for the 94 and 95. the 96-97 accord don't have a collector therefore the sensor is on the cat itself. you can find someone with a 94-95 accord and sell to them or drill a whole on ur cat and put the sensor on. My friend went to a muffler shop and they did the service for $70 which i thought was extremely crazy. He bought a cat for $30. He could have used that $70 + $30 to get a custom pipe done all the way to the muffler from the converter. I have a 94 accord. u can give it to me hbahahaha