P0455 – Evaporative Emission Control System Leak Detected (large leak)

System: Emissions
Dashboard light: Check engine light (MIL)
Check-engine blink code: —
Applies to: Generic OBD-II meaning. Not every code is used by this car.
Description: Evaporative Emission Control System Leak Detected (large leak)
Detection / symptoms: 1.Check engine light on 2.You likely won't notice any drivability problems
Possible causes: 1.A loose or improperly affixed gas cap 2.A non-conforming gas cap (i.e. not factory/original brand) 3.Other leak or damaged piece in EVAP system
What to check: 1.Read the code and live data with an OBD-II scanner 2.Look for exhaust or vacuum leaks and check the wiring of the sensor or valve 3.Test the part before replacing it 4.Fix the cause, clear the code and test-drive
Confidence: medium (generic OBD-II definition, not checked against the factory manual for this car)

Generic OBD-II meaning (obd-codes.com), not checked against this car's factory manual. Clear the code and test-drive to confirm it returns. Search all fault codes · Common problems · Warning lights