Powertrain: engine, transmission and driveline systems.
2
Generic SAE-standard code: same meaning on every make.
1F2
Specific fault index within the subsystem.
Frequently asked questions about P21F2
What does P21F2 mean?
Cylinder 12 Injector B Circuit Low. The control module detected that the signal in the Cylinder 12 Injector B circuit stayed below the expected operating range.
Is P21F2 generic or manufacturer-specific?
P21F2 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P21F2 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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