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P04B4
Refueling Vapor Control Valve Stuck Closed
Generic · engine
Data confidence
65%
The control module determined that the Refueling Vapor Control Valve did not change state as commanded and appears stuck.
TuningBot DTC Database · v4.37.15
P04B4 Refueling Vapor Control Valve Stuck Closed
Generic (OBD-II) interpretation in the TuningBot DTC database.
What P04B4 means
Related and nearby codes
How to read P04B4
P
Powertrain: engine, transmission and driveline systems.
0
Generic SAE-standard code: same meaning on every make.
4B4
Specific fault index within the subsystem.
Frequently asked questions about P04B4
What does P04B4 mean?
Refueling Vapor Control Valve Stuck Closed. The control module determined that the Refueling Vapor Control Valve did not change state as commanded and appears stuck.
Is P04B4 generic or manufacturer-specific?
P04B4 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P04B4 at file level?
If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.
Other file services
Understand the system behind this code: Diagnostic Strategy and DTC Logic