I just pulled the codes on my engine and one of them was 43, the knock sensor. I got under there and looked at it and the connector was all crudy and nasty so i wiped it off and the pin that it connects to on the sensor. I noticed that the pin was able to move around and spin, does that mean its broken or should there be some play in it? When i ran the car agian for about 10 min up and down the street it didnt throw the knock code again, just a lean code.