P0A06 Motor Electronics Coolant Pump Control Circuit Low

P0A06 points to a low condition in the motor electronics coolant pump control circuit. Pump control voltage, current, or feedback is below the expected range.

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 inverter components before proving the coolant pump low-control circuit and pump load.

Useful checks before replacing parts

Check pump command, control voltage, fuse supply, ground path, pump current draw, inverter temperature, coolant temperature, and freeze-frame operating state.
Inspect for short-to-ground faults, open power feeds, weak grounds, pump connector corrosion, seized pump load, coolant intrusion, and harness damage.
Load-test the pump circuit while commanded on to determine whether low voltage comes from wiring, pump load, relay, or controller output.

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.