P0CD4
Charge Port Door A Unlock Control Circuit High
Generic OBD-II
Common symptoms
What you'll notice
- 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
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
- Warning indicator lamp illuminates on the dashboard
- Hybrid/EV mode becomes unavailable
- Loss of power or reduced vehicle performance
Read & clear P0CD4 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.