Can't get check engine light to go out.

What is your question?

I have a 1999 Honda Accord throwing knock sensor code. Sensor has been changed. Connection at plug is good. Clear the code but comes back within 2 or 3 miles. Any help out there?

What makes this problem better or worse?

N/A

How long has your 1999 Honda Accord had this problem?

Bought car and had the engine changed. Engine install man told me they saw the check light on. They tested and replace the sensor. We can clear code but it will come back on in a distance of 2 or 3 miles.