DTC code

P2421: EVAP Canister Vent Shut Valve Stuck Open

Vehicle-specific published guides for this diagnostic trouble code.

P2421/Engine diagnostics

EVAP Canister Vent Shut Valve Stuck Open

P2421 may indicate that the EVAP system pressure response is not matching what the PCM expects when it commands the vent side closed during purge operation.

Article vehicle: 2016-2024 Honda Civic 1.5TurboGas

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P2421/Engine diagnostics

EVAP Canister Vent Shut Valve Stuck Open

P2421 may mean the vehicle is commanding the EVAP canister vent shut valve closed, but the pressure change in the EVAP system may not match what the PCM expects.

Article vehicle: 2016-2024 Honda Civic 2.0 Gas

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