DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (2GR-FKS) - Diagnostic Codes (4 Of 6) >> SFI System >> DTC P0455-00: Evaporative Emission System Leak Detected (Large Leak); DTC P0456-00: Evaporative Emission System Leak Detected (Very Small Leak) [12/2019 - 10/2022] >> Procedure

DTC P0455-00: Evaporative Emission System Leak Detected (Large Leak); DTC P0456-00: Evaporative Emission System Leak Detected (Very Small Leak) [12/2019 - 10/2022]: Procedure

  1. CHECK FUEL TANK CAP ASSEMBLY 
    NOTE:
    • A DTC may have been detected due to a loose fuel tank cap. Check the current condition and the conditions when the DTC was output with the customer.
    • If the vehicle was brought to the workshop due to DTC being output, but this DTC is not currently being output, the fuel cap may have been tightened.
    1. Check that the fuel tank cap is correctly installed.
    2. Tighten the fuel tank cap firmly (only one click sound could be heard).

      Result

      Test Result Suspected Trouble Area Proceed to
      Fuel tank cap correctly installed - A
      Fuel tank cap loose Fuel tank cap improperly installed B
      Defective fuel tank cap -
      No fuel tank cap - C

    Result: 

    A 

    See step  4

    Result: 

    C 

    See step  3

    Result: 

    B 

    See step  2

  2. CORRECTLY REINSTALL OR REPLACE FUEL TANK CAP ASSEMBLY 

    HINT: 

    • When reinstalling the fuel tank cap, tighten it firmly (only one click sound could be head).
    • When replacing the fuel tank cap, use a fuel tank cap that meets OEM specifications, and install it firmly.

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  4

  3. REPLACE FUEL TANK CAP ASSEMBLY 

    HINT: 

    When installing the fuel tank cap, tighten it firmly (only one click sound could be head).

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  4

  4. CLEAR DTC 
    1. Clear the DTCs.

      Powertrain > Engine > Clear DTCs 

      Result

      Proceed to
      NEXT
    2. Turn the ignition switch off and wait for at least 30 seconds.

    Result: 

    NEXT 

    See step  5

  5. PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE) 
    NOTE:
    • The Evaporative System Check (Automatic Mode) consists of 6 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 85% 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 higher, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the temperature less than 35°C (95°F).
    1. Perform the Evaporative System Check using the GTS.

      Powertrain > Engine > Utility 

      Tester Display
      Evaporative System Check
    2. After the Evaporative System Check is completed, check for pending DTCs.

      Powertrain > Engine > Trouble Codes 

      HINT: 

      If no pending DTCs are displayed, perform the Confirmation Driving Pattern. After this confirmation, check for pending DTCs. If no DTCs are displayed, the EVAP system is normal.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END 

    NOTE:

    There is a high possibility that a DTC was detected due to a loose fuel tank cap. Do not replace the parts.

    Result: 

    NG 

    GO TO EVAP SYSTEM 

    Refer to EVAP System [12/2019 - 10/2022]

Diesel-Data.com