Hybrid/EV Battery Temperature Sensor G Circuit Intermittent/Erratic
What it means
Hybrid/EV battery temperature sensor G is reporting an intermittent or erratic signal, so the reading drops in and out. These sensors let the battery management system watch pack temperature, which controls cooling, charging limits and power output.
Can I keep driving? Usually drivable in the short term, but battery protection may reduce power, so get it read soon and stop if a temperature or high-voltage warning appears. Do not open high-voltage (orange) cables or covers yourself; leave that to a trained technician.
What this part does
These sensors measure temperature at points inside the high-voltage battery pack. The battery control system uses the readings to run cooling or heating and to limit power or charging if the cells are too hot or too cold. The battery is part of a high-voltage system, so work on it is for trained people. A fault may result in a warning, reduced power, slower charging or louder cooling operation.
Common symptoms
What you'll notice
- Warning indicator lamp illuminates on the dashboard
- Hybrid/EV mode becomes unavailable
- Loss of power or reduced vehicle performance
Common causes
Most likely first
- Defective or malfunctioning hybrid/EV battery temperature sensor
- Wiring issues or loose connections in the hybrid/EV battery temperature sensor circuit
- Faulty hybrid/EV battery temperature sensor circuit
- Poor electrical grounding in the hybrid/EV battery temperature sensor circuit
How to diagnose & fix
Work through it in order
- Check and clean the battery temperature sensor connections
- Inspect and replace the battery temperature sensor if necessary
- Check for any loose or damaged wiring related to the battery temperature sensor
- Ensure that the battery cooling system is functioning properly
Related codes
Read & clear P0C80 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
Need a scanner that reads ABS, airbag and more? GaragePro OBD scan tools ship worldwide. See scanners →