Diagnostic article Generic OBD-II
P2C15: Exhaust profile sensor A circuit high is judged with the driver off
See how P2C15 distinguishes an unwanted power indication from normal energized operation.
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Documented application
2025 GM 25OBDG03B documented monitor only. Vehicle, engine and calibration applicability must be confirmed from the matching service information; no model fitment is inferred.
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.
P2C15 concerns the exhaust profile-position sensor A circuit being electrically high during an off command. The GM description classifies this as a short toward power. An on-state voltage, even if numerically similar, does not reproduce that command-to-signal contradiction.
The off state defines the comparison
Controller-specific voltage limits represent impedance below 0.5 Ω toward controller power. The source does not supply a universal connector-voltage expectation, and the criterion is not a measurement of profile-pin extension.
The related low-circuit monitor P2C14 uses the output-on state. Keeping those command conditions separate prevents a static measurement from being used as evidence that both tests passed. Command transitions can contain the information a final snapshot lacks.
Confirm the qualified sample pattern
Supply above 11 V, diagnostic enablement and ignition in crank or run are required. The monitor needs four failed reports out of five samples, with one-trip reporting listed independently. A solitary power-up excursion is not automatically equivalent to the recorded failure.
Preserve exhaust-channel A identity, off command and electrical status. The camshaft B label in the generic description refers to the exhaust system here; it must not be confused with sensor channel B. The table cannot identify the source of the unwanted power path or justify replacing a camshaft assembly. Localization needs the matching electrical procedure.
Source and applicability
2025 GM 25OBDG03B documented monitor only. Vehicle, engine and calibration applicability must be confirmed from the matching service information; no model fitment is inferred. These criteria explain controller logic, not a complete repair procedure. 25OBDG03B, PDF page 911. 25OBDG03B, PDF page 912.
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
B Camshaft Profile Actuator Position Sensor A Circuit High Bank 1
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