Powertrain: engine, transmission and driveline systems.
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Generic SAE-standard code: same meaning on every make.
4AF
Specific fault index within the subsystem.
Frequently asked questions about P04AF
What does P04AF mean?
EVAP System Purge Control Valve B Stuck Closed. The control module determined that the EVAP System Purge Control Valve B did not change state as commanded and appears stuck.
Is P04AF generic or manufacturer-specific?
P04AF is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P04AF 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.
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