P0A1E Drive Motor B Control Module Performance

P0A1E points to Drive Motor B control module performance. The module responds, but Motor B control or feedback is not plausible under the commanded 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 replace the control module before checking Motor B sensor inputs, cooling performance, and inverter status.

Useful checks before replacing parts

Compare Motor B torque command, motor speed, phase current, inverter temperature, DC bus voltage, module communication, and freeze-frame load data.
Inspect cooling flow, module connectors, low-voltage power and ground, shielded wiring, high-voltage interlock status, and water intrusion evidence.
Review related inverter, current sensor, position sensor, and isolation codes to decide whether the module is reacting to another fault.

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.