Diagnostic article Generic OBD-II
P0C82: Sensor H must agree with other module-group temperatures
P0C82 is a relative battery-temperature comparison for sensor H, with an absolute-deviation threshold and repeated-sample qualification.
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Documented application
15OBDG01 Hybrid Diagnostics, cited controller and monitor only. Historical calibration limits are not universal specifications; per-code vehicle, engine and hardware applicability must be verified.
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.
P0C82 is the battery-temperature sensor H range/performance check in the cited GM table. Its reference is the average temperature of the other module groups. The code therefore concerns disagreement between reports rather than a universal definition of a hot battery.
Retain the direction of the difference
The absolute deviation must exceed 20°C. Either a high or low H reading can cross that boundary. The diagnostic record should preserve H and the comparison temperatures, rather than simplify the result to an overheating claim.
The row uses 50 failing samples out of 67, evaluated at 100-millisecond intervals. A single unusual value does not establish the controller's complete qualification. The repeated pattern is relevant when considering an intermittent event or a changing thermal condition.
Confirm that the comparison is available
The temperature-rationality fault bundle must be false. Companion faults that affect that prerequisite belong in the evidence for both the original event and a retest. If the comparison is inhibited, no immediate returning P0C82 is not a completed pass.
The table does not decide whether H's difference reflects real temperature distribution or a sensing/reporting issue. That distinction requires the battery-specific service procedure and hardware mapping. No universal physical sensor address or replacement module is established by the letter H. A qualified high-voltage technician should perform any physical investigation while retaining the original comparative temperature evidence.
Source and applicability
15OBDG01 Hybrid Diagnostics, cited controller and monitor only. Historical calibration limits are not universal specifications; per-code vehicle, engine and hardware applicability must be verified.
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
Hybrid/EV Battery Temperature Sensor H Circuit Range/Performance
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