P0B67Hybrid/EV Battery Voltage Sense I Circuit Intermittent/Erratic
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- SAE J2012 reserves P0B67 for an unsteady signal on channel I, meaning readings that spike, drop and recover. No manufacturer documents this code publicly, and none of the GM tables that define the other four channel I codes includes an erratic test. The fault picture would sit between an open circuit (P0B63) and a frozen value (P0B64): the line works most of the time but loses contact under vibration, heat or current load. CARB requires battery voltage sensors to be monitored as inputs of the energy storage system, which explains why the code exists at all. For diagnosis, record cell voltage I with a scan tool during a drive and compare its noise with neighbouring channels H and J.
- What you may notice
- Sporadic warning without a reproducible pattern
- Momentary drop in electric power
- Likely causes
- LikelySense contact on channel I opening under vibration or heat
- PossibleCorroded terminal in the module connector
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €80 – €5,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.