i own a 94 gsr, and one of the sensors broke off while i was replacing the oil cooler, its the sensor right above the coolant pipe, not the one next to the oil cooler, right between the head and the coolant pipe on the back of the block, can anybody tell me what this is? and where i can get another on at. please help!!!!!!!

 

sounds like the knock sensor. What code is the ecu throwing