P0BBE watches the gap between the highest and the lowest cell voltage in the pack. GM's first-generation Volt sets it when that difference exceeds 0.3 V in 50 of 245 samples taken every 100 ms, provided the cell voltage rationality fault is not active; it is a one-trip Type A fault. Stellantis lists the code on the Jeep Grand Cherokee 4xe and Wrangler 4xe together with P0B24, P0DAB and a state-of-health code, where updated battery pack control module software is the remedy and an unresolved case can end in a no-start. Chrysler's warranty extension for the 2017 to 2021 Pacifica Hybrid replaces the whole high-voltage pack for this code. Its companion P0BBD reports a spread that has exceeded a set limit.
High severity. Can I keep driving?If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.
Symptoms
- MIL and hybrid system warning
- Reduced electric range or propulsion
- Vehicle may not start
Most likely causes
- Cells drifted apart beyond what balancing can correct
- Battery pack control module software needing an update
- Defective or aged high-voltage battery pack
- Faulty cell voltage measurement simulating a spread
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- It can trigger limp mode.
- It affects emissions.
What each character of P0BBE means
- P: Powertrain: engine and transmission
- 0: Generic code: same on every make
- B: Subsystem depends on the code range
- BE: Specific fault in that system
Frequently asked questions
Can I keep driving with code P0BBE?
If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.
What causes code P0BBE?
The most common causes are: cells drifted apart beyond what balancing can correct; battery pack control module software needing an update; defective or aged high-voltage battery pack.
Related codes
- P0BBDHybrid/EV Battery Pack Voltage Variation Exceeded Limit
- P0DABHybrid/EV Battery Cell Balancing Performance
- P0A7FHybrid/EV Battery Pack Deterioration
- P0B23Hybrid/EV Battery A Voltage
- P0B24Hybrid/EV Battery A Voltage Unstable
- P0B28Hybrid/EV Battery B Voltage Unstable
Sources
- gsi.ext.gm.com: 11OBDG01 HYBRID Diagnostics
- static.nhtsa.gov: MC 11013152 0001
- static.nhtsa.gov: MC 11028228 0001
- static.nhtsa.gov: MC 11023167 0001
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.