P0A15 DC/DC Converter Temperature Sensor A Circuit Intermittent

P0A15 indicates an intermittent DC/DC converter temperature sensor A circuit fault. Converter temperature data becomes invalid only under some conditions.

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 clear intermittent converter temperature faults without checking harness movement and connector retention.

Useful checks before replacing parts

Review freeze-frame data, converter load, 12-volt current demand, road vibration, moisture exposure, and related intermittent converter or sensor codes.
Inspect connector pin fit, harness flex points, water intrusion, loose grounds, heat damage, sensor mounting, and coolant leaks where applicable.
Wiggle-test and heat-test the sensor circuit while graphing converter temperature to reproduce spikes, dropouts, or open-circuit behavior.

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.