P0A6C DC/DC Converter B

P0A6C indicates a DC/DC Converter B fault. The hybrid system detected a problem with converter B operation, feedback, or supporting circuits.

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 replace the 12-volt battery for a converter code until converter output and status feedback are verified.

Useful checks before replacing parts

Check converter B enable status, 12-volt output voltage, high-voltage readiness, converter temperature, freeze-frame load, and related charging codes.
Inspect converter connectors, fuses, low-voltage grounds, cooling flow where applicable, high-voltage interlock status, and water intrusion.
Compare converter command with actual 12-volt system voltage and status feedback before deciding the converter is internally faulty.

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.