P0CA4
Hybrid/EV Battery Charging Voltage High
Generic OBD-II
Common symptoms
What you'll notice
- Check the battery voltage using a multimeter to ensure it is within the recommended range.
- Inspect the battery charging system for any loose or damaged connections.
- Test the charging voltage regulator to see if it is functioning properly and adjust if necessary.
- Clean or replace dirty or worn
- out battery terminals to ensure proper connection.
- If all else fails, consider replacing the hybrid/EV battery to resolve the high charging voltage issue.
Common causes
Most likely first
- Faulty hybrid/EV battery charging system
- Malfunctioning hybrid/EV battery charger
- Issue with the hybrid/EV battery management system
- Constant high voltage from the charging source
How to diagnose & fix
Work through it in order
- Decreased performance
- Electric system failures, such as issues with lights or power accessories
Read & clear P0CA4 yourself
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