P0B19Hybrid/EV Battery Pack Voltage Sense C Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Voltage sense C is the third of up to four pack voltage measurements defined in SAE J2012. P0B19 is its general circuit code and sets when the battery controller finds this input electrically unusable, for instance open or without a valid raw value. Which measuring point a manufacturer assigns to C is its own choice. No manufacturer documents P0B19 publicly. GM shows the principle for channel A, checking pack-side voltage against limits and against the summed cell voltages (P0ABB to P0ABD). CARB requires battery voltage sensors of hybrid storage systems to be monitored as input components. The detailed fault types of channel C are P0B1A to P0B1D. High-voltage operation is usually limited.
- What you may notice
- MIL and hybrid/EV system warning on
- Battery power limited, reduced electric drive or assist
- Vehicle may not reach Ready or may shut down the high-voltage system
- Likely causes
- LikelyVoltage sense lead C or its fuse open
- PossibleSense connector loose or corroded
- PossibleMeasurement input of the battery controller defective
- 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: €100 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.