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P0D21
Battery Charger A Output Voltage Too Low
Generic · engine
Data confidence
65%
The control module detected that the Battery Charger A Output Voltage value was below the expected limit.
TuningBot DTC Database · v4.37.14
P0D21 Battery Charger A Output Voltage Too Low
Generic (OBD-II) interpretation in the TuningBot DTC database.
What P0D21 means
Related and nearby codes
How to read P0D21
P
Powertrain: engine, transmission and driveline systems.
0
Generic SAE-standard code: same meaning on every make.
D21
Specific fault index within the subsystem.
Frequently asked questions about P0D21
What does P0D21 mean?
Battery Charger A Output Voltage Too Low. The control module detected that the Battery Charger A Output Voltage value was below the expected limit.
Is P0D21 generic or manufacturer-specific?
P0D21 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P0D21 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.
Other file services
Understand the system behind this code: Diagnostic Strategy and DTC Logic