How do you fix Code PO325 in a 97 Infiniti J30?

Code PO325 indicates a problem with the knock sensor circuit in a 1997 Infiniti J30. To fix it, first, inspect the knock sensor and its wiring for any damage or corrosion. If the sensor is faulty, replace it with a new one, and ensure all connections are secure. After repairs, clear the code using an OBD-II scanner and test drive the vehicle to ensure the issue is resolved.