P0B2E: Hybrid/EV Battery C Voltage High
What to do
As P0B26 — do not fast-charge while it is present.
What this code means
Battery C's voltage is above expectation — the damaging direction, with the charging equipment the likelier suspect. Argument at P0B26.
Likely causes
Start here
- Charging system overvoltage · specialist
Less common
- Faulty DC-DC converter · specialist
- Damaged cell voltage sense harness · specialist
- Faulty battery energy control module · specialist
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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