Powertrain: engine, transmission and driveline systems.
2
Generic SAE-standard code: same meaning on every make.
1EF
Specific fault index within the subsystem.
Frequently asked questions about P21EF
What does P21EF mean?
Cylinder 10 Injector B Circuit High. The control module detected that the signal in the Cylinder 10 Injector B circuit stayed above the expected operating range.
Is P21EF generic or manufacturer-specific?
P21EF is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P21EF 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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