P0AD1: Hybrid/EV Battery Pack Cooling Fan 3 Stuck On
What to do
As P0A83 — fix before the flat-battery mornings start.
What this code means
The third fan runs when it should not — noise and an overnight twelve-volt drain, per P0A83, with the same bounded-after-run caveat separating design from fault.
Likely causes
Start here
- Faulty hybrid battery cooling fan · moderate
Less common
- Wiring shorted to voltage · moderate
- Fault stored in the 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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