Can drive — fix at your convenience.
This code means the computer detected an open circuit in the wiring or solenoid for the EVAP vent control valve. This valve seals the EVAP system during leak tests and lets the charcoal canister breathe. The usual fix is replacing the vent valve or repairing broken wiring or a corroded connector, and it's normally an inexpensive repair.
$100 – $280
Varies by vehicle and root cause.
Yes, it's generally fine. The engine runs normally since this is an emissions fault and not a mechanical one. Just get it repaired before an emissions test and to keep the EVAP system working properly.
Most repairs land between $100 and $280. The vent valve part is cheap; labor depends on its location near the fuel tank or canister. A simple wiring or connector fix can cost less.
No, it's a low-severity code. It won't damage your engine or put you in danger. The biggest issues are the warning light and failing an emissions test until you fix it.
The computer sends a signal to open and close the vent valve and watches the circuit's response. When it sees no electrical continuity, it interprets that as an open circuit and stores P0448.