P0456Low severity
Evaporative Emission System Leak Detected (Very Small Leak)
A very small leak was detected in the EVAP system.
Common causes
- Slightly loose fuel cap
- Tiny crack in EVAP hose
- Faulty purge/vent valve seal
Possible symptoms
- Check Engine Light on
Code breakdown
P — System
Powertrain (engine, transmission, fuel & emissions)
0 — Type
Generic (SAE standard, common to all manufacturers)
4 — Subsystem
Auxiliary emission controls