P0A6A Boost Voltage Control Module

P0A6A indicates a boost voltage control module fault. The hybrid system detected a problem with the module controlling or monitoring boosted high-voltage supply.

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 service boost voltage hardware without disabling the high-voltage system and proving voltage is absent.

Useful checks before replacing parts

Check boost module communication, DC bus voltage, boost command, inverter demand, battery voltage, freeze-frame data, and related converter or isolation codes.
Inspect module power and ground, cooling operation, high-voltage connector seating, interlock status, water intrusion, and low-voltage control wiring.
Verify whether the fault is communication, module power supply, boost control response, voltage sensing, or supporting high-voltage wiring.

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.