P0AD0Hybrid/EV Battery Pack Cooling Fan 3 Performance/Stuck Off
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0AD0 is a functional fault: the control line of battery fan 3 may be electrically fine, but the blower does not deliver what was commanded, or stays still. Depending on design, the controller compares fan speed feedback with the request, or, as a Honda patent describes, compares the expected battery temperature change for the known cooling capacity with the measured one. CARB asks for such a functional check of the battery cooling where feasible. No manufacturer publicly documents P0AD0 itself; circuit faults of the same fan are P0ACF, P0AD2 and P0AD3, the opposite case is P0AD1. The driver usually sees a hybrid warning and reduced power on hot days.
- What you may notice
- Hybrid or EV system warning light
- Power or regeneration limited after longer drives or in heat
- Battery temperature rises faster than usual
- Likely causes
- LikelyFan intake or duct blocked by dirt, pet hair or objects (often under or beside a seat)
- PossibleWorn bearings or debris slowing the fan wheel
- PossibleSpeed feedback signal from fan 3 missing or implausible
- RareWeak 12 V supply or poor ground at the fan
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €50 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.