Possible Causes
WARNING: This page is about a different car, the 2004 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
- DTC P0442, P0456 or P0457 can be generated by:
- Loose or missing fuel filler cap
- Loose or damaged connectors to the fuel vapor hoses, tubes or connections. (including EVAP canister assembly, tank assembly, vapor lines, purge valve)