Diagnostic article Generic OBD-II
P0D3F: low charger AC peak voltage with a long observation window
The GM P0D3F example requires low reported AC peak voltage while AC is present and the bulk-voltage-dropping condition is false.
Read before applying this article
Documented application
GM 2015 15OBDG01 Hybrid Diagnostics, only the cited EACCM monitor and calibration. Per-code vehicle and engine applicability has not been established; these historical thresholds are not universal service specifications.
The code alone does not identify a failed part or establish that a vehicle is safe to drive. Confirm the vehicle, reporting module and applicable service procedure.
GM's P0D3F row evaluates a low AC peak-voltage report at the battery charger. The monitored quantity is explicitly a peak value. It should not be confused with an ordinary household AC RMS reading or a universal specification for every charging installation.
A low reading alone is incomplete evidence
The documented failure boundary is below 90 V. The controller requires that condition for 5,500 milliseconds within a 6,875-millisecond observation window. It also requires AC to be present and the bulk-voltage-dropping flag to be false.
Those qualifications make the sequence important. A reading taken after AC disappears or during expected voltage decay does not establish that this monitor should fail. The pass branch calls for an acceptable peak-voltage report for 6,875 milliseconds; a momentary recovery is not the same evidence.
Preserve the charging-state context
Record the reported peak voltage alongside AC-present status, voltage-decay status and the time of the fault. That combination lets a technician assess whether the input really met the test's conditions or whether the reported state is inconsistent.
The table does not distinguish a supply problem from a faulty internal voltage measurement. Nor does it prescribe replacing the charger. It establishes what the controller regarded as an out-of-range report. Use the vehicle-specific diagnostic procedure for that distinction, and leave high-voltage access to trained personnel. Applying the 90 V number directly to an unspecified meter or test point would ignore the measurement type and calibration scope.
Source and applicability
GM 2015 15OBDG01 Hybrid Diagnostics, only the cited EACCM monitor and calibration. Per-code vehicle and engine applicability has not been established; these historical thresholds are not universal service specifications.
Article source documents
Source checks describe how the text was prepared; they do not certify a diagnosis or confirm compatibility with every vehicle using this code.
Original code reference
Dictionary definition
Battery Charger A Input Voltage Sensor A Circuit Low
This definition retains its original catalog scope. The article above is limited to its explicitly documented application.
Reference scope
Generic OBD-II definition.
A manufacturer label does not establish the model, year, engine or module to which a diagnosis applies. Read the safety and diagnostic limits.
Definition source
- DTC Database: pinned community code definitions
Source checked · MIT