Hybrid/EV Battery Temperature Sensor B Circuit Low

Where it lives

For P0AC7, the sensor sits on the circuit this code reports. The description of P0AC7 reports a fault at the sensor.

Check these first

• A short to ground on the battery temperature sensor B signal wire
• Water or corrosion in the sensor B connector
• A failed battery temperature sensor B
• Low battery voltage or state of charge
• A faulty battery management system input

What to do next

1. Read battery temperature sensor B on live data
2. Inspect the sensor B connector for water or corrosion
3. Test the sensor B signal wire for a short to ground
4. Check hybrid battery voltage and state of charge
5. Replace battery temperature sensor B if the reading stays low
6. Clear the code and retest

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