2003 Nissan Frontier Crew Cab "p1444 p0325" Questions

P0325 and P1444 Service engine soon light stays on Nissan code: P1444 Canister Purge Volume Control Solenoid Valve Generic OBD II code: DTC Codes - P0300-P0399 ? Ignition System or Misfire P0325 Knock

P1444 - See Service Manual. I also had another code of P0325 - Knock Sensor which I replaced already but still get the P1444 code. Can anyone please give me any ideas or suggestions on the P1444 Code.