Hybrid/EV Battery Pack Current Sensor A Circuit Intermittent/Erratic

Where it lives

For P0AC3, the sensor sits on the circuit this code reports. The description of P0AC3 reports a fault at the sensor.

Check these first

• A loose or corroded current sensor A connector
• A failing battery pack current sensor A
• A wire chafed or partially broken in the sensor A circuit
• Internal faults in the hybrid battery pack disturbing current flow
• A poor ground shared by the sensor A circuit

What to do next

1. Wiggle test the current sensor A connector while watching live data
2. Inspect the current sensor A connector for corrosion
3. Test the sensor A wiring for intermittent opens
4. Check the hybrid battery pack for cell faults
5. Replace current sensor A if the signal keeps dropping
6. Clear the code and retest

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