P0448 fault code: what it means

P0448: EVAP vent valve control circuit shorted.

Engine and gearbox (powertrain) · Minor

Usual causes, most likely first

shorted vent solenoid
wiring short

P0448 by make

Nissan

EVAP canister vent control valve stuck closed. Fuel tank can build vacuum; pump may click off early when refuelling.

Usual causes: vent control valve stuck closed; blocked vent hose; EVAP canister saturated with water; EVAP pressure sensor fault

Subaru

EVAP vent control circuit shorted.

Usual causes: canister vent valve; wiring short

What the repair usually costs

CVT valve body replacement (remanufactured, in car)NZ$1,280–NZ$2,420 · A$1,200–A$2,400
A/C compressor replace incl. drier and flush (European)NZ$1,560–NZ$3,200 · A$1,490–A$3,050
Parking sensor replace, one sensorNZ$130–NZ$520 · A$130–A$510

Not sure what P0448 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.