One of the 22re guys will have to help you with the location - I have the V6. But the code does not diagnose a short or open circuit in the sensor, it diagnoses a short or open circuit in the sensor circuit. It could be the sensor, but often the problem is the connection to the sensor. Knock sensors in particular are a rare failure point, but it's not uncommon for connectors to get corroded. However, if the connector is okay, it is possible the sensor could be bad.