P0456
Evaporative Emission System Leak Detected (Very Small Leak)
OBD-II
Fuel vapour (EVAP)
What it means
A very small vapour leak — a hairline crack in a hose or a marginal cap seal. Harmless to drive; will fail emissions.
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Check your car freeRelated codes
P0440
Evaporative Emission System
Fuel vapour (EVAP)Low
P0441
Evaporative Emission System Incorrect Purge Flow
Fuel vapour (EVAP)Low
P0442
Evaporative Emission System Leak Detected (Small Leak)
Fuel vapour (EVAP)Low
P0443
Evaporative Emission System Purge Control Valve Circuit
Fuel vapour (EVAP)Low
P0444
Evaporative Emission System Purge Control Valve Circuit Open
Fuel vapour (EVAP)Low
P0445
Evaporative Emission System Purge Control Valve Circuit Shorted
Fuel vapour (EVAP)Low
P0446
Evaporative Emission System Vent Control Circuit
Fuel vapour (EVAP)Low
P0447
Evaporative Emission System Vent Control Circuit Open
Fuel vapour (EVAP)Low
General reference only — what a code means can vary by make and model. Confirm with a qualified technician.