P0B7C: sense-N verification must show a valid completed monitor

P0B7C identifies battery voltage-sense circuit N in the cited GM BECM open-sensing table. A repair should restore trustworthy voltage measurement on the correct channel, not merely remove the stored number from a scan report.

Clearing and passing are different events

The shared monitor has a sustained fault window and communication prerequisites. It is also restricted by certain internal sensing-module and cell-balancing faults and by a separate protection self-test. If those conditions inhibit evaluation, no returning P0B7C does not demonstrate that circuit N passed.

Record whether the diagnostic actually evaluated after the repair, along with the N-channel and neighboring values. A single plausible value is useful but incomplete evidence.

Recheck the pattern that originally supported the fault

The manufacturer describes adjacent-voltage differences, shared sensing-power effects and busbar-side cases. A repair that changes only one displayed value may leave a shared problem unresolved. The source does not assign one unique mechanism to N.

The positive-side busbar criterion is incomplete in the printed table. This draft does not invent that threshold or a physical channel location; both require the applicable service information.

Qualified battery diagnosis should establish the affected measurement path and perform the required high-voltage isolation before physical access. Verification should preserve the original evidence and the successful enabled test so the repair conclusion can be reviewed, rather than rest solely on erased memory.

Application limits

Document-level 2015 GM diagnostic table; per-code vehicle/engine/calibration applicability not established.

Source

15OBDG01 Hybrid Diagnostics, physical PDF pages 635, 636.