DTC P0456 Evaporative Emission Control System Leak Detected (Very Small Leak): Trouble Symptom
WARNING: This page is about a different variant/trim than selected.
- Fuel odor
- There is a hole of more than 0.5 mm (0.020 in) dia. in evaporation system or fuel tank.
CAUTION:
After servicing or replacing faulty parts, perform Clear Memory Mode Refer to
, OPERATION , Clear Memory Mode and Inspection Mode Refer to
, PROCEDURE , Inspection Mode.
| Step | Check | Yes | No |
|---|---|---|---|
1 CHECK FUEL FILLER CAP.
NOTE:
The DTC is stored in memory if fuel filler cap is or was loose or if the cap chain has caught while tightening.
|
Is the fuel filler cap tightened securely? | Go to step 2. | Tighten fuel filler cap securely. |
| 2 CHECK FUEL FILLER CAP. | Is the fuel filler cap genuine? | Go to step 3. | Replace with a genuine fuel filler cap. |
| 3 CHECK FUEL FILLER PIPE GASKET. | Is there any damage to the seal between fuel filler cap and fuel filler pipe? | Repair or replace the fuel filler cap and fuel filler pipe. Refer to FUEL FILLER PIPE Fuel Filler Pipe. | Go to step 4 . |
4 CHECK DRAIN VALVE.
NOTE:
Drain valve can be operated using the Subaru Select Monitor. For detailed procedures, refer to "SYSTEM OPERATION CHECK MODE". Refer to
, SYSTEM OPERATION CHECK MODE .
|
Does the drain valve operate? | Go to step 5. | Replace the drain valve. Refer to DRAIN VALVE Drain Valve. |
| 5 CHECK PURGE CONTROL SOLENOID VALVE. Operate the purge control solenoid valve using the Subaru Select Monitor.
NOTE:
Purge control solenoid valve operation can be executed using Subaru Select Monitor. For detailed procedures, refer to "SYSTEM OPERATION CHECK MODE". Refer to
, SYSTEM OPERATION CHECK MODE .
|
Does the purge control solenoid valve operate? | Go to step 6. | Replace the purge control solenoid valve. Refer to PURGE CONTROL SOLENOID VALVE Purge Control Solenoid Valve. |
6 CHECK EVAPORATIVE EMISSION CONTROL SYSTEM LINE.
|
Is there any hole of more than 0.5 mm (0.020 in) dia. on evaporation line? | Repair or replace the evaporation line. Refer to FUEL DELIVERY AND EVAPORATION LINES Fuel Delivery and Evaporation Lines. | Go to step 7 . |
| 7 CHECK CANISTER. | Is the canister damaged or is there a hole of more than 0.5 mm (0.020 in) dia. in it? | Repair or replace the canister. Refer to CANISTER Canister. | Go to step 8 . |
| 8 CHECK FUEL TANK. Remove the fuel tank. Refer to FUEL TANK Fuel Tank. |
Is the fuel tank damaged or is there any hole of more than 0.5 mm (0.020 in) dia. in it? | Repair or replace the fuel tank. Refer to FUEL TANK Fuel Tank. | Go to step 9 . |
| 9 CHECK ANY OTHER MECHANICAL TROUBLE IN EVAPORATIVE EMISSION CONTROL SYSTEM. | Is there any hole of more than 0.5 mm (0.020 in) dia., crack, clogging, or disconnections, bend, misconnection of hoses or pipes in evaporative emission control system? | Repair or replace the hoses or pipes. | Repair the poor contact of ECM connector. |