P0A41 Drive Motor B Current Sensor Circuit

P0A41 indicates a Drive Motor B current sensor circuit problem. The controller cannot trust Motor B current feedback used for torque and inverter control.

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 inverter or Motor B high-voltage cables without disabling and verifying the high-voltage system is safe.

Useful checks before replacing parts

Compare Motor B current sensor data with torque command, phase current, inverter status, motor speed, DC bus voltage, and freeze-frame operating load.
Inspect current sensor wiring, connector terminals, shielded cable routing, inverter connector sealing, low-voltage grounds, and water intrusion.
Measure or graph current feedback according to service information to separate sensor, harness, inverter, and controller input faults.

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.