P0A16 Drive Motor A Position Sensor Circuit

P0A16 indicates a Drive Motor A position sensor circuit problem. The controller cannot reliably determine Motor A rotor position for torque 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 Motor A high-voltage connections without disabling and verifying the high-voltage system is safe.

Useful checks before replacing parts

Review motor position sensor data, resolver or encoder signals, phase current, motor speed, inverter status, freeze-frame torque command, and related motor codes.
Inspect low-voltage sensor wiring, shielded cable routing, connector terminals, inverter connector condition, water intrusion, grounds, and harness damage.
Scope or graph the position sensor signals according to service information before separating motor, inverter, or wiring 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.