Powertrain: engine, transmission and driveline systems.
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Generic SAE-standard code: same meaning on every make.
4AC
Specific fault index within the subsystem.
Frequently asked questions about P04AC
What does P04AC mean?
EVAP System Purge Control Valve B Circuit Low. The control module detected that the signal in the EVAP System Purge Control Valve B circuit stayed below the expected operating range.
Is P04AC generic or manufacturer-specific?
P04AC is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P04AC 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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