P0BE8: motor A phase U high is a sensing-range result

GM assigns P0BE8 to the high-range check of motor A phase U current sensing. The generic circuit-high title should be interpreted with the controller state in the source. It is not interchangeable with a code for excessive current during inverter operation.

Reconstruct the range check

The sensor's reported phase U value must exceed 700 A. Evaluation requires the wakeup signal on and PWMOutputEnable set to FALSE. A diagnostic record should retain that state alongside the reported value, rather than assuming the number represents actual running motor current.

The row uses ten qualifying counts within fifteen at a 2.08 ms rate and lists two-trip reporting. These are calibration detection details, not instructions to reproduce the threshold using workshop equipment.

Preserve the dependency on this fault

The phase U offset monitor P0BE6 is inhibited while P0BE8 or its low counterpart is active. That relationship can explain why a separate performance fault is absent even though the current-sensing channel is not behaving normally.

The table does not establish which connection or internal component caused the high report. Vehicle-specific service information is required for safe signal identification and diagnosis. A disabled PWM command does not constitute high-voltage isolation. A trained technician should verify credible readings and eligible monitor operation after repair, rather than relying only on erased fault memory.

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 284.