P0BC5: Hybrid/EV Battery Temperature Sensor E Circuit High
What to do
As P0BC2 — the reading governs what the car permits the battery to do, so a sensor fault costs performance and charging rate on a healthy pack.
What this code means
Temperature sensor E is reading above its valid range — a short, or a circuit fault pushing the signal past what any real temperature would produce.
Worth separating from a genuine over-temperature, which has its own codes and its own urgency. A circuit reading out of range is an instrument fault; a pack that is actually too hot is a different conversation and would normally arrive with company. The family's argument is at P0BC2.
Likely causes
Start here
- Faulty battery temperature sensor · specialist
- Corroded or loose connector · easy
Less common
- Damaged cell voltage sense harness · specialist
- Faulty battery pack sensor 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
Be the first to write this up
Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
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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