Diagnostic article Generic OBD-II
P2C05: Intake profile-position sensor A has a driver-level circuit check
Understand the electrical open-circuit logic described for P2C05 before treating it as a failed position transition.
Read before applying this article
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.
P2C05 concerns the intake camshaft profile-actuator position sensor A circuit in the cited GM row. Although the title names a position sensor, the published monitor describes a controller-driver electrical test performed while the output is powered on. It should not be rewritten as a simple mechanical position-error check.
Identify which evidence the controller evaluates
Voltage is compared with implementation-specific limits representing an open circuit. The row associates that result with impedance above 200 kΩ toward controller ground. This is an electrical classification, not proof that the profile mechanism moved to an incorrect endpoint.
The source explicitly requires the output to be commanded on. A normal-looking signal captured while that output is off therefore does not reproduce the stated monitor, even if the same scan-tool parameter is displayed.
Keep the test’s operating conditions
Diagnostic enablement, supply above 11 V and ignition in crank or run are required. Four failures among five samples establish the result, with one-trip reporting listed separately. The sample rule should not be replaced by a conclusion from a single disconnected reading.
Useful evidence retains channel A, the command state and driver status. The table does not provide a physical sensor location or connector identity, nor does it distinguish a sensor-associated circuit interruption from wiring or controller issues. A matching service procedure is needed before localizing the open result or making a component decision.
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 897.
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 Camshaft Profile Actuator Position Sensor A Circuit 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