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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

PSystem
Powertrain (engine, transmission, fuel & emissions)
0Type
Generic (SAE standard, common to all manufacturers)
4Subsystem
Auxiliary emission controls

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