Powertrain: engine, transmission and driveline systems.
2
Generic SAE-standard code: same meaning on every make.
1AF
Specific fault index within the subsystem.
Frequently asked questions about P21AF
What does P21AF mean?
Reductant Level Sensor C Circuit Low. The control module detected that the signal in the Reductant Level Sensor C circuit stayed below the expected operating range.
Is P21AF generic or manufacturer-specific?
P21AF is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P21AF 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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