Diagnostic article Generic OBD-II
P212D: A high signal on throttle-position sensor 2 at bank 2
Learn how the P212D range check differs from a throttle-angle disagreement or actuator movement failure.
Read before applying this article
Documented application
2025 GM 25OBDG07A Part 2 monitor tables only; model, engine and transmission applicability are not established by the unresolved application-matrix filename join.
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.
P212D identifies a high raw throttle-position input in the illustrated GM implementation. The table maps the generic circuit-G code to sensor 2 at bank 2. This mapping is specific to the documented control arrangement and does not establish a universal pedal or throttle connector location.
The high boundary is an electrical criterion
The source lists raw voltage above 4.805 V and a 0.14-second failure period. This evaluates whether the input lies inside its electrical operating range. A high signal is not automatically a reliable measurement of a wide-open throttle angle.
Drive and postdrive controller states are included, together with safety fuel-cut and limp-home qualifications. A voltage observation taken outside the enabled logic does not constitute a complete reproduction of the monitor.
What information remains trustworthy
Once this input has failed its range test, conclusions derived from its converted position require caution. A separate rationality diagnosis asks whether position channels and airflow-derived information agree; it should not be confused with this direct upper-limit check.
Useful evidence records sensor 2's raw value, the associated controller state and the other throttle-related diagnostic statuses. The next task is to establish the actual circuit identity and locate the electrical cause using applicable service information. The monitor does not distinguish a sensor defect from an unwanted supply connection or an internal measurement problem, nor does it prescribe replacing the throttle assembly from the code alone.
Source and scope
2025 GM 25OBDG07A Part 2 monitor tables only; model, engine and transmission applicability are not established by the unresolved application-matrix filename join. These are documented monitor criteria, not a universal repair procedure. GM PDF, physical page 628.
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
Throttle Position Sensor/Switch G Circuit High
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