Service engine soon light on 1998 Nissan Sentra

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.

by in Appleton, WI on November 23, 2009
3 answers 2 comments
ANSWER by , November 23, 2009
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 Description Evaporative emission (EVAP) canister purge system - vent control valve malfunction Cause Wiring, EVAP vent valve, EVAP pressure sensor, hose leak/blockage, EVAP canister contaminated, EVAP vacuum cut valve, ECM
ANSWER by , November 23, 2009
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
COMMENT by , November 23, 2009
thanks for such a quick response!!
COMMENT by , November 23, 2009
Please e-mail me at
ANSWER by , June 28, 2011
where is the canister vent valve located?