Diagnostic article Generic OBD-II
P0D7C: phase-V current-low belongs to the stopped-compressor check
GM P0D7C evaluates phase-V current feedback at zero requested speed; the printed signal direction needs calibration-specific interpretation.
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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.
P0D7C is the phase-V current-low diagnostic in this GM electric-compressor table. Its named phase distinguishes it from P0D7A on phase U and from the DC-link current monitor. A generic statement about total compressor current would omit that distinction.
Zero requested speed is part of the evidence
The failure evaluation requires a compressor speed request of zero, sufficient low-voltage supply and Accessory or Run/Crank hardware state. It counts 30 failed samples out of 60, sampled every 50 milliseconds. Those conditions describe a stopped-command current-feedback check, not a running-load assessment.
The printed comparison uses a positive upper-side phase-V input boundary despite the current-low title. The internal signal and sign convention is not established by this parameter page. The article therefore does not turn the numerical expression into an external current-test limit or silently rename the code.
Keep phase identity through verification
A technician should retain the exact controller, phase-V report and request state from the event. An observation on another phase can supply context but cannot automatically substitute for the signal this monitor evaluates. The source also records a reset prerequisite before passing is enabled after failure.
The fault does not establish which winding, semiconductor or connection is defective. Appropriate vehicle-specific diagnostics must resolve signal mapping and hardware condition. No safe access, phase-disconnection or live-probing procedure is supplied here; electric-compressor high-voltage and refrigerant precautions still apply.
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
A/C Compressor Motor Phase V Current 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