DTC P0455 EVAP System (CPC) Leak Detected (Large Leak): Notes

DTC detecting condition: 

Detected when two consecutive driving cycles with fault occur.

Trouble symptom: 

• Fuel odor
• There is a hole of more than 1.0 mm (0.04 in) dia. in evaporation system or fuel tank.
• Fuel filler cap loose or lost

1. CHECK FUEL FILLER CAP. 
   1. Turn the ignition switch to OFF.
   2. Check the 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?

   • Yes: Go to  2.
   • No: Tighten fuel filler cap securely.
2. CHECK FUEL FILLER CAP. 

   Is the fuel filler cap genuine?

   • Yes: Go to  3.
   • No: 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?

   • Yes: Repair or replace the fuel filler cap and fuel filler pipe. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>Fuel Filler Pipe .
   • No: Go to 4. 
4. CHECK PURGE CONTROL SOLENOID VALVE. 

   Check air-tightness of the purge control solenoid valve. Ref. to EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES) (H4DOTC)>Purge Control Solenoid Valve>INSPECTION .

   Is the purge control solenoid valve OK?

   • Yes: Go to  5.
   • No: Replace the purge control solenoid valve. Ref. to EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES) (H4DOTC)>Purge Control Solenoid Valve .
5. CHECK EVAPORATIVE EMISSION CONTROL SYSTEM LINE. 

   Are there holes on the evaporation line?

   • Yes: Repair or replace the evaporation line. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>Fuel Delivery and Evaporation Lines .
   • No: Go to 6. 
6. CHECK CANISTER. 

   Are there holes on the canister?

   • Yes: Replace the canister. Ref. to EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES) (H4DOTC)>Canister .
   • No: Go to  7.
7. CHECK LEAK CHECK VALVE ASSEMBLY. 

   Are there damage or holes on the leak check valve assembly?

   • Yes: Replace the leak check valve assembly. Ref. to EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES) (H4DOTC)>Leak Check Valve Assembly .
   • No: Go to 8. 
8. CHECK FUEL TANK. 

   Remove the fuel tank. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>Fuel Tank .

   Are there damage or holes on the fuel tank?

   • Yes: Repair or replace the fuel tank. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>Fuel Tank .
   • No: Go to 9. 
9. CHECK ANY OTHER MECHANICAL TROUBLE IN EVAPORATIVE EMISSION CONTROL SYSTEM. 

   Are there holes, cracks, clogging, or disconnection, misconnection of hoses or pipes in evaporative emission control system?

   • Yes: Repair or replace the hoses or pipes.
   • No: Repair the poor contact of ECM connector.