Powertrain: engine, transmission and driveline systems.
2
Generic SAE-standard code: same meaning on every make.
04D
Specific fault index within the subsystem.
Frequently asked questions about P204D
What does P204D mean?
Reductant pressure sensor - circuit high. The control module detected that the signal in the Reductant pressure circuit stayed above the expected operating range.
Is P204D generic or manufacturer-specific?
P204D is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P204D 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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