Nissan Repair: 2003 Nissan Xterra P0328 AND P0442 Codes, actron scan tool, nissan xterra

Question
Hello...I just used my  ACTRON scan tool and my service engine soon light is on.The vehicle is a 2003 Nissan Xterra. The codes I got were P0328 and P0442. I do know from reading other ansewrs that the p0328 is the Knock sensor, but what is the P0442 Code mean or which sensor or other things need to be done to eliminate it from setting off the service engine soon light?
where is the knock sensor located on the engine?
where is the sensor located for the p0442 code..if it means I need to also replace that sensor.
Thank you for your time and expertise help...Chris in Massachusetts

Answer
Chris,

The knock sensor is located under the intake.  That is, if yours is a V6.  If not, it is behind and below the intake on a four cylinder.

The P0442 is an evaporative leak.  You will need to look at the fuel hoses to see if any are rotted or the clamps need tightening.  Now, if the gas cap was not tight it could cause this code too.