P0A84 Hybrid Battery Pack Cooling Fan 2 Performance

P0A84 points to hybrid battery pack cooling fan 2 performance. Fan 2 operates but airflow, speed, or cooling response is not meeting expected demand.

Code status

Needs verification

Not yet verified against SAE J2012_202509 / J2012DA. Treat unverified rows as a lookup aid, not repair authority.

System: Hybrid / EV
Scope: iso-sae-controlled-p0
Standard: SAE J2012 / ISO 15031-6
Source: legacy-import

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not assume all battery cooling fans share the same fault; test fan 2 airflow and circuit behavior directly.

Useful checks before replacing parts

Compare fan 2 command, fan speed feedback, battery temperature sensors, cabin or intake air temperature, freeze-frame load, and related cooling codes.
Inspect dirty filters, blocked ducts, weak fan output, fan blade debris, connector voltage drop, battery vent blockage, and airflow path leaks.
Command fan speeds and verify actual airflow and battery temperature response instead of relying only on motor noise.

Related OBD-II codes

These nearby hybrid / ev entries can help compare wording and fault area. They may share the same verification status as the source database.