P0455

DTC P0455: Evaporative Emission Control System Leak Detected (Gross Leak)

System / Wiring Diagram:

System / Circuit Description
While engine running, ECM (PCM) closes EVAP canister vent valve and opens EVAP canister purge valve. If EVAP emission control system is in good condition, EVAP emission control system pressure that detected by fuel pressure sensor becomes down. After that, ECM (PCM) closes EVAP canister purge valve leaving EVAP canister vent valve is closed. If EVAP emission control system is in good condition, the fuel tank pressure rises specified rate.

DTC Detecting Condition and Trouble Area:

DTC Confirmation Procedure

WARNING:
- When performing a road test, select a place where there is no traffic or possibility of a traffic accident and very careful during testing to avoid occurrence of an accident.
- Road test should be carried out with 2 persons, a driver and a tester, on a level road.

NOTE:
Check to make sure that the following conditions are satisfied when using this "DTC Confirmation Procedure".
- Intake air temperature: between -10 °C and 62 °C (14 °F and 144 °F)
- Atmospheric pressure: higher than 560 mmHg (Altitude: lower than 2790 m (9150 ft))

1. With ignition switch OFF, connect scan tool.
2. Turn ON ignition switch and clear DTC by using scan tool if any.
3. Start engine and warm up to normal operating temperature.
4. Increase vehicle speed to 40 km/h (25 mph) or more.
5. Keep above vehicle speed for 15 min. (Throttle valve operating is kept constant in this step.)
6. Stop vehicle, check whether evaporative system monitoring test has completed or not by using scan tool. If evaporative system monitoring test has not completed, check vehicle conditions (environmental) and repeat Steps 3 through 6. If evaporative system monitoring test has completed, check DTC and pending DTC.

Step 1 - 6:

Step 7:

DTC Troubleshooting