P0A06 - Motor Electronics Coolant Pump Control Circuit Low

The hybrid/EV control system detected a fault related to motor electronics coolant pump control circuit low. High-voltage diagnosis/service requires appropriate training, PPE, isolation procedures, and manufacturer service information.

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Code Overview

The hybrid/EV control system detected a fault related to motor electronics coolant pump control circuit low. High-voltage diagnosis/service requires appropriate training, PPE, isolation procedures, and manufacturer service information.

Common Causes

• High-voltage interlock, isolation, cooling, sensor, inverter, converter, or battery-control concern
• Low-voltage supply, ground, connector, or communication fault affecting the hybrid/EV control system
• Cooling airflow or coolant-flow problem where the code involves inverter, motor, or battery temperature
• Internal component fault only after external circuit, safety, and service-information checks support it

Diagnostic Steps

1. Confirm all hybrid/EV and low-voltage codes, freeze-frame data, and ready-state symptoms
2. Do not open or probe high-voltage battery packs casually; follow manufacturer isolation and verification procedures
3. Inspect accessible low-voltage connectors, grounds, service plugs/interlocks, coolant level, airflow paths, and cooling fans as applicable
4. Use scan-tool data to compare commanded vs. actual pump, fan, inverter, converter, motor, and battery parameters
5. Escalate high-voltage testing to qualified personnel with proper PPE, insulated tools, and current service information

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