Powertrain: engine, transmission and driveline systems.
2
Generic SAE-standard code: same meaning on every make.
1DF
Specific fault index within the subsystem.
Frequently asked questions about P21DF
What does P21DF mean?
Cylinder 2 Injector B Circuit High. The control module detected that the signal in the Cylinder 2 Injector B circuit stayed above the expected operating range.
Is P21DF generic or manufacturer-specific?
P21DF is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P21DF 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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