P0B2EHybrid/EV Battery C Voltage High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0B2E is set when the voltage of hybrid/EV battery C exceeds its upper limit. It pairs with P0B2D for undervoltage; P0B2C covers unstable readings and P0B2B the general fault. No manufacturer publishes a description of P0B2E. GM's comparable monitor for the complete pack is P0ABD, which fails above 479 V and is Type A, so the MIL comes on at once. CARB requires monitoring of hybrid battery voltage sensors and cells and dedicated codes for the replaceable unit. An overvoltage reading usually comes from a cell group that ended up overcharged because balancing failed, or from a drifting measurement channel. The controller then blocks or reduces charging and regenerative braking; plugging in may be refused.
- What you may notice
- Hybrid/EV system or high-voltage battery warning on
- MIL on
- Charging or recuperation restricted
- External charging refused
- Likely causes
- PossibleCell group in battery C charged too high, balancing ineffective
- PossibleDrifting voltage measurement channel or sense lead fault
- RareBattery controller software 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.