P0A93 Inverter A Cooling System Performance

P0A93 indicates inverter A cooling system performance is below the expected level. The inverter cooling loop is not removing heat as commanded or modeled.

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 continue high-load hybrid operation if inverter cooling performance is questionable.

Useful checks before replacing parts

Compare inverter temperature, coolant pump command, coolant temperature, fan operation, freeze-frame load, and related inverter cooling or pump codes.
Inspect coolant level, trapped air, pump operation, radiator or heat exchanger restriction, hoses, leaks, connector corrosion, and cooling fan airflow.
Command the cooling pump and fans where supported and verify actual coolant movement and inverter temperature response.

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.