Possible Causes
WARNING: This page is about a different car, the 2002 Mazda B4000, 2002 Mazda B3000, and 2002 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.
Possible causes are:
- Aftermarket EVAP hardware (i.e. fuel filler cap) not meeting required specifications (P0455).
- Disconnected or cracked fuel EVAP canister tube, EVAP canister purge outlet tube or EVAP return tube (P0455).
- EVAP canister purge valve stuck closed (P0455).
- Damaged or missing fuel filler cap (P0455).
- Insufficient fuel filler cap installation (P0455).
- Loose fuel vapor hose/tube connections to EVAP system components (P0455).
- Blockages or restrictions in fuel vapor hoses/tubes (P0455).
- Fuel vapor control valve tube assembly or fuel vapor vent valve assembly blocked (P0455).
- Canister Vent (CV) solenoid stuck open (P0455).
- Mechanically inoperative FTP sensor (P0455).
- Pinched, blocked or plugged fuel vapor tubes/hoses except between fuel tank and EVAP canister (P1443).
- Damaged EVAP canister (P0455 or P1443).
- Disconnected, cracked or cut fuel vapor tubes/hoses except between fuel tank and EVAP canister (P1443).
- Damaged EVAP canister purge valve (P1443).