Powertrain: engine, transmission and driveline systems.
2
Generic SAE-standard code: same meaning on every make.
1E3
Specific fault index within the subsystem.
Frequently asked questions about P21E3
What does P21E3 mean?
Cylinder 4 Injector B Circuit High. The control module detected that the signal in the Cylinder 4 Injector B circuit stayed above the expected operating range.
Is P21E3 generic or manufacturer-specific?
P21E3 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P21E3 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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