Powertrain: engine, transmission and driveline systems.
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Generic SAE-standard code: same meaning on every make.
4EF
Specific fault index within the subsystem.
Frequently asked questions about P04EF
What does P04EF mean?
EVAP System Very Small Leak Detected - Fresh Air Side. The control module detected a leak in the EVAP System Very Small during the system leak monitor.
Is P04EF generic or manufacturer-specific?
P04EF is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P04EF 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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