What's the 2004 Honda Element code p0325?

The OBD fault code P0325 in the 2004 Honda Element likely indicates a bad knock sensor. The knock sensor is basically a microphone that listens to and detects knocking noises coming from the engine. The computer uses the inputs to help adjust timing. When the timing is off there will be a significant decrease in power and possible mIS Fires. This can greatly affect the gas mileage, the computer may tell the fuel system to spray more fuel than it should. If the knock sensor fails it will trigger the check engine light and a series of knock sensor related OBD codes. Make sure none of the wires are damaged going to the knock sensor and that there is no contamination such as engine oil.