P0A96: Hybrid/EV Battery Pack Cooling Fan 2 Control Circuit/Open
What to do
As P0A81 — nothing feels wrong while the pack loses half its cooling. Worth fixing before hot weather rather than after, and worth cleaning both fans while access is open.
What this code means
The second battery cooling fan's control circuit has failed open.
Larger packs move more heat than one fan can carry, so they carry two or more — and the fan 2 family mirrors fan 1 at P0A81–P0A85 exactly. Everything there applies: the circuit codes are electrical diagnoses, the dusty-fan caveat holds, and a pack running on half its cooling ages faster than a managed one even though nothing feels different from the driver's seat.
One addition specific to multi-fan packs: with fan 1 still working, the pack may hold safe temperatures in mild conditions and only run hot under summer load — so this code plus a heat wave is a worse combination than the code alone suggests.
Likely causes
Start here
- Open circuit in control wiring · moderate
- Faulty hybrid battery cooling fan · moderate
- Corroded or loose connector · easy
Symptoms
Components involved
Information, not instruction
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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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- The car — make, model, year and engine. The same fault behaves differently on each.
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