Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC Confirmation Procedure
- If DTC P0456 is displayed with P0442, first perform the trouble diagnosis for DTC P0456 .
- After repair, check that the hoses and clips are installed properly .
- If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
- Turn ignition switch OFF and wait at least 10 seconds.
- Turn ignition switch ON.
- Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
- Open engine hood before conducting the following procedure .
- If any of the following conditions are met just before the DTC confirmation procedure, leave the vehicle for more than 1 hour
.
- Fuel filler cap is removed .
- Fuel is refilled or drained .
- EVAP component part/parts is/are removed .
- Before performing the following procedure, confirm that battery voltage is more than 11 V at idle .
WITH CONSULT-III
- Turn ignition switch ON and select "DATA MONITOR" mode with CONSULT-III.
- Check that the following conditions are met.
FUEL LEVEL SE: 0.25 - 1.4 V
COOLAN TEMP/S: 0 - 32°C (32 - 90°F)
FUEL T/TMP SE: 0 - 35°C (32 - 95°F)
INT/A TEMP SE: More than 0°C (32°F)
If NG, turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle), or refill/drain fuel until the output voltage of the "FUEL LEVEL SE" meets within the range above and leave the vehicle for more than 1 hour. Then start from step 1.
- Turn ignition switch OFF and wait at least 10 seconds.
- Turn ignition switch ON.
- Select "EVAP V/S LEAK P0456/P1456" of "EVAPORATIVE SYSTEM" in "DTC WORK SUPPORT" mode with CONSULT-III.
Follow the instructions displayed.
- Check that "OK" is displayed.
If "NG" is displayed, go to "DIAGNOSIS PROCEDURE ".
- If the engine speed cannot be maintained within the range displayed on CONSULT-III screen, go to "BASIC INSPECTION ".
- Check that EVAP hoses are connected to EVAP canister purge volume control solenoid valve properly.
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.