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1998 Nissan Sentra Question: Service engine soon light



tou-tou, Appleton, WI, November 23, 2009, 22:59

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
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  • Answer #1

    November 23, 2009, 23:28

    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

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  • Medium-star Best Answer
    November 24, 2009, 00:06

    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

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  • Reply

    tou-tou, November 24, 2009, 00:23

    thanks for such a quick response!!

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  • Reply

    backyard tech, November 24, 2009, 00:36

    Please e-mail me at swaths3644@mypacks.net

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  • Answer #3

    June 28, 2011, 15:09

    where is the canister vent valve located?

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