Powertrain: engine, transmission and driveline systems.
2
Generic SAE-standard code: same meaning on every make.
421
Specific fault index within the subsystem.
Frequently asked questions about P2421
What does P2421 mean?
Evaporative emission (EVAP) vent valve - valve stuck open. The control module determined that the Evaporative emission (EVAP) vent valve - valve did not change state as commanded and appears stuck.
Is P2421 generic or manufacturer-specific?
P2421 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P2421 at file level?
If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry and, where the ECU needs it, corrects the checksum too. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.
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