Q: Service engine soon light on 1998 Nissan Sentra

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Hi, I my service engine soon light came on and are showing the codes:P0440 and P1448. This just happened.
Can you tell me what these two codes mean.
Thank you for your time.
(3) Answers
(2) Comments
Assuming that you have a 1.6 litre engine.

Vehicle Application: 1998 Nissan Sentra 1.6L, Vin A, Eng Des GA16DE

Customer Concern: Trouble codes P0440 and P1448.
Tests/Procedures: 1. Blow through the canister vent control valve with the key off. It should be easy to blow through.

2. With the ignition switch on, ground the Purple/White trace wire. One should not be able to blow through the solenoid at this time.
Potential Causes: Canister Vent Control Valve

Tech Tips: The canister vent control valve is a common failure on this vehicle.
Diagnostic Codes: P0440, P1448
Common Problems that Trigger the P0440 code:

* Missing Fuel Cap
* Defective or damaged Fuel Cap
* Distorted or damaged Fuel Tank filler neck
* Torn or punctured Evaporative System hose(s)
* Defective Fuel Tank Sending Unit gasket or seal
* Split or damaged Carbon Canister
* Defective Evaporative Vent Valve and/or Evaporative Purge Valve
* Defective or damaged Fuel Tank
* Defective Fuel Tank Pressure Sensor

Number P1448
Type Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled

Evaporative emission (EVAP) canister purge system - vent control valve malfunction

Wiring, EVAP vent valve, EVAP pressure sensor, hose leak/blockage, EVAP canister contaminated, EVAP vacuum cut valve, ECM