P0BD2: inverter A sensor 2 plausibility is a cold-soak comparison

P0BD2 is the in-range rationality check for inverter A temperature sensor 2 in this GM document. The generic name calls it inverter temperature sensor C performance. The source associates that channel with PIM Temp 1, rather than a universal physical sensor location.

Look for disagreement after the soak

The monitor compares PIM Temp 1 with the inverter-temperature average. An absolute difference greater than 15°C is the failure criterion. Ignition must have been off for at least 360 minutes, while the average inverter and motor temperatures must meet the stated minimum range conditions.

That long-off requirement changes interpretation: a comparison made during active heating is not the cold-soak test described here. Preserve the shutdown history and the related temperature readings instead of diagnosing from one warm-running value.

Circuit faults can prevent the comparison

The source inhibits rationality while listed inverter or motor temperature out-of-range faults are active. Those direct circuit faults should be understood before treating the performance report as independent evidence of a sensor bias.

The printed timing cell is incomplete in this row, so this article does not reconstruct a missing failure-count value from a neighboring sensor. Confirm the exact calibration timing in applicable service information. The useful supported finding is the cold-soak disagreement, not a proven defective sensor or cooling-system repair. High-voltage inverter access requires trained hybrid-service personnel.

Source and applicability

GM 2010 10OBDG10 Hybrid Diagnostics, cited BPCM or hybrid-controller monitor only. Historical calibration values are not universal specifications; no per-code model, engine or hardware fitment has been established. GM PDF, physical page 289.