P0447 fault code: what it means

P0447: EVAP vent valve control circuit open.

Engine and gearbox (powertrain) · Minor

Usual causes, most likely first

failed vent solenoid (near the charcoal canister)
corroded connector
broken wire

P0447 by make

Nissan

EVAP canister vent control valve circuit open or shorted. Leak tests cannot run; may cause fuel filling problems.

Usual causes: vent control valve faulty; wiring or connector fault (valve sits near the canister/tank)

Subaru

EVAP vent control circuit open.

Usual causes: canister vent valve; wiring fault

What the repair usually costs

A/C compressor replace incl. drier and flush (European)NZ$1,560–NZ$3,200 · A$1,490–A$3,050

Not sure what P0447 means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.