Chevrolet P0BBE
Hybrid Battery Pack Voltage Variation Note: The vehicle will prevent a subsequent start attempt with a latched DTC P0AFA. Cause This condition may be caused by one or more of the 9
Quick answer
For applicable 2011–2015 Chevrolet Volt vehicles in North America, DTC P0BBE is identified in GM bulletin 19NA117 as Hybrid Battery Pack Voltage Variation. The bulletin links it to possible degradation of one or more of the 96 high-voltage battery cell groups, where a degraded cell can have lower voltage than the other cells.
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
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1. What does P0BBE mean?
For applicable 2011–2015 Chevrolet Volt vehicles in North America, DTC P0BBE is identified in GM bulletin 19NA117 as Hybrid Battery Pack Voltage Variation. The bulletin links it to possible degradation of one or more of the 96 high-voltage battery cell groups, where a degraded cell can have lower voltage than the other cells.
2. Technical explanation
GM bulletin 19NA117 states that P0BBE may be set with P0AFA (Hybrid/EV Battery System Voltage Low Voltage). It identifies a possible cause as degradation in one or more of the 96 cell groups in the high-voltage battery pack. A degraded cell may show a lower voltage than the remaining cells in the pack. The bulletin also states that the vehicle will prevent a subsequent start attempt when P0AFA is latched.
3. What system is affected?
High-voltage hybrid battery pack, including its 96 cell groups.
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
- No start.
- Loss or reduction in propulsion before a no-start event.
- P0BBE may be present with P0AFA.
6. Possible causes
- One or more of the 96 high-voltage battery cell groups may have degraded.
- A degraded cell may have a lower voltage than the rest of the battery-pack cells.
7. Can I still drive the vehicle?
Not yet established by verified evidence. The bulletin does report possible loss or reduction in propulsion before a no-start event.
8. Can I charge the vehicle?
Not yet established by verified evidence.
9. What you can safely do
- Arrange professional diagnosis by a qualified Chevrolet/GM service facility.
- Do not attempt high-voltage battery diagnosis or repair yourself.
- If P0AFA is latched, be aware that the bulletin states the vehicle will prevent a subsequent start attempt.
10. Step-by-step troubleshooting
- Have a qualified technician retrieve and evaluate stored DTCs, including P0BBE and P0AFA if present.
- Use GM bulletin 19NA117 as applicable service information for a 2011–2015 Chevrolet Volt in North America.
- Not yet established by verified evidence: further specific diagnostic steps.
11. When to contact service
Contact a Chevrolet/GM service facility or qualified high-voltage vehicle technician, particularly if propulsion has been reduced or the vehicle will not start.
12. What the service center may check
- Check for DTC P0BBE and P0AFA.
- Evaluate high-voltage battery cell-group voltage variation using applicable GM service procedures.
- Assess whether one or more of the 96 battery cell groups has degraded.
13. Possible repair or resolution
- Not yet established by verified evidence.
14. Affected vehicles
- Chevrolet Volt · 2011–2015 · US
15. Related TSBs / service bulletins
- GM bulletin 19NA117, published May 24, 2019; NHTSA manufacturer communication PDFs MC-10161927-9999 and MC-10161904-9999. It applies to 2011–2015 Chevrolet Volt vehicles in North America and addresses no-start or loss/reduction of propulsion associated with P0AFA and/or P0BBE.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
NHTSA-hosted GM manufacturer communication: 19NA117 (https://static.nhtsa.gov/odi/tsbs/2019/MC-10161927-9999.pdf).
19. Frequently asked questions
What does P0BBE mean on an applicable Chevrolet Volt?
GM bulletin 19NA117 identifies P0BBE as Hybrid Battery Pack Voltage Variation.
What can cause P0BBE according to GM bulletin 19NA117?
The bulletin states that one or more of the 96 high-voltage battery cell groups may have degraded, and that a degraded cell may have lower voltage than the other pack cells.
Can P0BBE cause a no-start condition?
The bulletin lists no start as a reported condition and states that a subsequent start attempt will be prevented if P0AFA is latched. It does not establish that P0BBE alone always causes a no-start.
Which vehicles are covered by the supplied bulletin evidence?
The supplied evidence identifies 2011–2015 Chevrolet Volt vehicles in North America.