P0B2FHybrid/EV Battery D Voltage
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0B2F is the general voltage fault of hybrid/EV battery D, the fourth and last sub-battery in this code family. The controller reports with it that the voltage of unit D is implausible, without specifying unstable (P0B30), low (P0B31) or high (P0B32). Only packs that the manufacturer splits into four separately monitored units can set it, and no manufacturer documents P0B2F publicly. For orientation, GM checks the whole pack with P0ABB to P0ABD, including a comparison of the pack voltage with the sum of all cells. CARB requires voltage sensors and cells of hybrid storage systems to be monitored, with codes pointing to the smallest replaceable unit. The driver sees a hybrid or battery warning and reduced power.
- What you may notice
- Hybrid/EV system or high-voltage battery warning on
- MIL on
- Battery power limited, less electric drive or assist
- Charging or recuperation restricted
- Likely causes
- PossibleWeak or failing cells or module in battery D
- PossibleFault in the voltage sense leads or connectors of battery D
- RareBattery controller software or internal measurement fault
- 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 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.