SFI SYSTEM, Diagnostic DTC:P1449

DTC Code DTC Name
P1449 Evaporative Emission System Lid Open Switch Stuck ON

DTC SUMMARY

DTC No. Monitoring Item Malfunction Detection Condition Trouble Area Detection Timing Detection Logic
P1449 Canister filter clogged The canister pressure sensor output value has rapidly changed.

  • Clogged on EVAP line (drain hose, pipe and tube)

  • Clogged on EVAP line (canister pump module)

  • Clogged on canister pump module

 While ignition switch off 2 trip

DESCRIPTION

The description can be found in EVAP (Evaporative Emission) System Click here.

MONITOR DESCRIPTION

The ECM monitors for canister filter in the canister pump module. The pressure is checked every 5 seconds and if the pressure difference becomes more than threshold, stops the EVAP system monitor. The ECM then illuminates the MIL and stores the DTC (2 trip detection logic).

CONFIRMATION DRIVING PATTERN

Note


  • The Evaporative System Check (Automatic Mode) consists of 5 steps performed automatically by the GTS. It takes a maximum of approximately 24 minutes.

  • Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable.

  • Do not run the engine during this operation.

  • When the temperature of the fuel is 35°C (95°F) or more, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the fuel temperature below 35°C (95°F) and the coolant temperature below 45°C (113°F).


  1. Connect the GTS to the DLC3.

  2. Turn the ignition switch to ON and turn the GTS on.

  3. Clear DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the ignition switch off and wait for at least 30 seconds.

  5. Turn the ignition switch to ON and turn the GTS on.

  6. Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode.

  7. After the Evaporative System Check is completed, check for All Readiness by entering the following menus: Powertrain / Engine / Utility / All Readiness.

  8. Input the DTC: P1449.

  9. Check the DTC judgment result.

    GTS Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

  10. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs Click here.

    Tech Tips


    • If a permanent DTC is output, the system is malfunctioning.

    • If no permanent DTC is output, the system is normal.

PROCEDURE


  1. INSPECT EVAP HOSE (DRAIN HOSE, PIPE AND TUBE)


    1. Check for filter blockage in the drain hose, pipe and tube.

      OK
      OK: No blockages in the drain drain hose, pipe and tube.

    NG

    REPLACE EVAP HOSE (DRAIN HOSE, PIPE AND TUBE) Click here

    OK

  2. INSPECT EVAP HOSE (CANISTER PUMP MODULE - DRAIN TUBE)


    1. Check for filter blockage in the EVAP purge line between the canister pump module and drain tube.

      OK
      No blockages in the EVAP purge line between the canister pump module and drain tube.

    NG

    REPLACE EVAP HOSE (CANISTER PUMP MODULE - DRAIN TUBE) Click here

    OK

  3. INSPECT CANISTER PUMP MODULE (CANISTER FILTER)


    1. Check for filter blockage in the canister pump module (canister filter).

      OK
      No blockages in the canister filter.

    NG

    REPLACE CANISTER PUMP MODULE (CANISTER FILTER) Click here

    OK

  4. REPLACE CANISTER PUMP MODULE


    1. Replace the canister pump module Click here.


    NEXT

    PERFORM EVAP SYSTEM Click here

  5. REPLACE EVAP HOSE (DRAIN HOSE, PIPE AND TUBE)


    NEXT

    PERFORM EVAP SYSTEM Click here

  6. REPLACE EVAP HOSE (CANISTER PUMP MODULE - DRAIN TUBE)


    1. Replace the clogged EVAP purge line.


    NEXT

    PERFORM EVAP SYSTEM Click here

  7. REPLACE CANISTER PUMP MODULE (CANISTER FILTER)


    1. Replace the canister pump module Click here.


    NEXT

  8. PERFORM EVAP SYSTEM

    Note


    • The Evaporative System Check (Automatic Mode) consists of 5 steps performed automatically by the GTS. It takes a maximum of approximately 24 minutes.

    • Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable.

    • Do not run the engine in this step.

    • When the temperature of the fuel is 35°C (95°F) or more, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the fuel temperature below 35°C (95°F) and the coolant temperature below 45°C (113°F).


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs Click here.

    5. Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode.

    6. After the Evaporative System Check is completed, check for pending DTCs by entering the following menus: Powertrain / Engine / Trouble Codes.

      Tech Tips

      If no pending DTCs are found, the repair has been successfully completed.


    NEXT

    END